GLORIA

GEOMAR Library Ocean Research Information Access

X
Language
Preferred search index
Number of Hits per Page
Default Sort Criterion
Default Sort Ordering
Size of Search History
Default Email Address
Default Export Format
Default Export Encoding
Facet list arrangement
Maximum number of values per filter
Auto Completion
Topics (search only within journals and journal articles that belong to one or more of the selected topics)
Show more topics
Feed Format
Maximum Number of Items per Feed
Permalink If you want to be able to use settings permanently, you must save your settings and then set a Bookmark to the permalink

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Online Resource  (17)
  • Walter de Gruyter GmbH  (17)
  • 1
    Online Resource
    Online Resource
    Rare earth-ruthenium-magnesium intermetallics
    Walter de Gruyter GmbH ; 2017
    In:  Zeitschrift für Naturforschung B Vol. 72, No. 6 ( 2017-5-24), p. 447-455
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 72, No. 6 ( 2017-5-24), p. 447-455
    Abstract: Eight new intermetallic rare earth-ruthenium-magnesium compounds have been synthesized from the elements in sealed niobium ampoules using different annealing sequences in muffle furnaces. The compounds have been characterized by powder and single crystal X-ray diffraction. Sm 9.2 Ru 6 Mg 17.8 ( a =939.6(2), c =1779(1) pm), Gd 11 Ru 6 Mg 16 ( a =951.9(2), c =1756.8(8) pm), and Tb 10.5 Ru 6 Mg 16.5 ( a =942.5(1), c =1758.3(4) pm) crystallize with the tetragonal Nd 9.34 Ru 6 Mg 17.66 type structure, space group I 4/ mmm . This structure exhibits a complex condensation pattern of square-prisms and square-antiprisms around the magnesium and ruthenium atoms, respectively. Y 2 RuMg 2 ( a =344.0(1), c =2019(1) pm) and Tb 2 RuMg 2 ( a =341.43(6), c =2054.2(7) pm) adopt the Er 2 RuMg 2 structure and Tm 3 Ru 2 Mg ( a =337.72(9), c =1129.8(4) pm) is isotypic with Sc 3 Ru 2 Mg. Tm 3 Ru 2 Mg 2 ( a =337.35(9), c =2671(1) pm) and Lu 3 Ru 2 Mg 2 ( a =335.83(5), c =2652.2(5) pm) are the first ternary ordered variants of the Ti 3 Cu 4 type, space group I 4/ mmm . These five compounds belong to a large family of intermetallics which are completely ordered superstructures of the bcc subcell. The group-subgroup scheme for Lu 3 Ru 2 Mg 2 is presented. The common structural motif of all three structure types are ruthenium-centered rare earth cubes reminicent of the CsCl type. Magnetic susceptibility measurements of Y 2 RuMg 2 and Lu 3 Ru 2 Mg 2 samples revealed Pauli paramagnetism of the conduction electrons.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2017-0048
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    Equiatomic indides RE IrIn ( RE =La, Pr, Nd, Er–Yb) – Crystal and electronic structure
    Walter de Gruyter GmbH ; 2017
    In:  Zeitschrift für Naturforschung B Vol. 72, No. 9 ( 2017-9-26), p. 631-638
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 72, No. 9 ( 2017-9-26), p. 631-638
    Abstract: The equiatomic rare earth iridium indides RE IrIn ( RE =La, Pr, Nd, Er–Yb) were synthesized by reaction of the elements in induction or muffle furnaces and were characterized through X-ray powder patterns. The structures of LaIr 0.86 In 1.14 , PrIr 0.89 In 1.11 , NdIr 0.94 In 1.06 , ErIrIn (all ZrNiAl type, P 6̅2 m ), and YbIrIn (TiNiSi type, Pnma ) were refined from single crystal X-ray diffractometer data. Refinements of the occupancy parameters revealed small degrees of solid solutions with indium substitution on the iridium sites. Chemical bonding analyses and electronic structure calculations indicate the dominance of metallic bonding in addition to partial ionic interactions between the cations and polyanions, as well as covalent contributions between the indium and iridium atoms.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2017-0086
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    The High-temperature Modification of LuAgSn and High-pressure High-temperature Experiments on DyAgSn, HoAgSn, and YbAgSn
    Walter de Gruyter GmbH ; 2008
    In:  Zeitschrift für Naturforschung B Vol. 63, No. 2 ( 2008-2-1), p. 193-198
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 63, No. 2 ( 2008-2-1), p. 193-198
    Abstract: The high-temperature modification of LuAgSn was obtained by arc-melting an equiatomic mixture of the elements followed by quenching the melt on a water-cooled copper crucible. HT-LuAgSn crystallizes with the NdPtSb-type structure, space group P6 3 mc: a = 463.5(1), c = 723.2(1) pm, wR2 = 0.0270, 151 F 2 , and 11 variables. The silver and tin atoms build up two-dimensional, puckered [Ag 3 Sn 3 ] networks (276 pm Ag-Sn) that are charge-balanced and separated by the lutetium atoms. The Ag-Sn distances between the [Ag 3 Sn 3 ] layers of 294 pm are much longer. Single crystals of isotypic DyAgSn (a = 468.3(1), c = 734.4(1) pm, wR 2 = 0.0343, 411 F 2 , and 11 variables) and HoAgSn (a = 467.2(1), c = 731.7(2) pm, wR 2 = 0.0318, 330 F 2 , and 11 variables) were obtained from arc-melted samples. Under high-pressure (up to 12.2 GPa) and high-temperature (up to 1470 K) conditions, no transitions to a ZrNiAl-related phase have been observed for DyAgSn, HoAgSn, and YbAgSn. HT-TmAgSn shows Curie-Weiss paramagnetism with μ eff = 7.53(1) μ B /Tm atom and θ P = −15.0(5) K. No magnetic ordering was evident down to 3 K. HT-LuAgSn is a Pauli paramagnet. Room-temperature 119 Sn Mössbauer spectra of HT-TmAgSn and HT-LuAgSn show singlet resonances with isomer shifts of 1.78(1) and 1.72(1) mm/s, respectively
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2008-0213
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2008
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Equiatomic iron-based tetrelides T FeSi and T FeGe ( T = Zr, Nb, Hf, Ta) – A 57 Fe Mössbauer-spectroscopic study
    Walter de Gruyter GmbH ; 2019
    In:  Zeitschrift für Naturforschung B Vol. 74, No. 2 ( 2019-02-25), p. 211-219
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 74, No. 2 ( 2019-02-25), p. 211-219
    Abstract: The equiatomic iron-silicides T FeSi as well as the corresponding germanides T FeGe with the electron-poor 4 d and 5 d transition metals ( T =Zr, Nb, Hf, Ta) have been synthesized from the elements by arc-melting. All samples were characterized through their lattice parameters using powder X-ray diffraction (Guinier technique). Four structures were refined from single-crystal X-ray diffractometer data: a =640.16(3), b =393.45(5), c =718.42(6) pm, Pnma , 390 F 2 values, 20 parameters, wR 2=0.0294 for ZrFeSi (TiNiSi type), a =719.63(11), b =1119.27(7), c =649.29(7) pm, Ima 2, 1103 F 2 values, 54 parameters, wR 2=0.0555 for NbFeGe (TiFeSi type), a =655.96(7), c =372.54(4) pm, P 6̅2 m , 251 F 2 values, 15 parameters, wR 2=0.0260 for HfFeGe (ZrNiAl type) and a =624.10(3), b =378.10(6), c =725.25(7) pm, Pnma , 369 F 2 values, 20 parameters, wR 2=0.0513 for TaFeGe (TiNiSi type). The common structural motif of the four different structures is the slightly distorted tetrahedral tetrel ( tr ) coordination of the iron atoms and a trigonal prismatic coordination of iron by T =Zr, Nb, Hf, Ta. Three compounds were characterized as Pauli-paramagnetic by measuring their susceptibility. The measurement of the electrical resistivity of NbFeSi characterises this compound as a good metal. Furthermore, 57 Fe Mössbauer spectra of all compounds could be obtained at room temperature, revealing a clear correlation between the structural distortions and the quadrupole splitting parameters.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2018-0237
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2019
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Structure and Properties of α- and β-CeCuSn: A Single Crystal and Mössbauer Spectroscopic Investigation
    Walter de Gruyter GmbH ; 2007
    In:  Zeitschrift für Naturforschung B Vol. 62, No. 5 ( 2007-5-1), p. 647-657
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 62, No. 5 ( 2007-5-1), p. 647-657
    Abstract: Two modifications of CeCuSn were prepared from the elements: the high-temperature (β ) modification crystallizes directly from the quenched sample, while the low-temperature (α) modification is formed after annealing at 700 °C for one month. Both modifications were investigated by powder and single crystal X-ray diffraction. We find for β -CeCuSn the ZrBeSi-type structure, space group P6 3 /mmc, a = 458.2(1), c = 793.7(2) pm, wR2 = 0.0727, 148 F 2 values, 8 variable parameters. In the case of α-CeCuSn we find the NdPtSb-type structure, space group P6 3 mc, a = 458.4(1), c = 785.8(2) pm, wR2 = 0.0764, 233 F 2 values, 11 variable parameters. The copper and tin atoms build up layers of ordered [Cu3Sn3] hexagons. The layers are planar in β -CeCuSn, however, with highly anisotropic displacements of the copper and tin atoms. In α-CeCuSn a puckering effect is observed resulting in a decrease of the c lattice parameter. Both modifications of CeCuSn exhibit antiferromagnetic ordering, but there is a considerable difference in their magnetic behaviour. Anomalies in the physical properties of the α- and β -modifications of CeCuSn have been detected by Mössbauer spectroscopy and magnetic and specific heat measurements, which serve to explain the structure-property relations.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2007-0504
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2007
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Magnetic and magnetocaloric properties of the coloured Heusler phases GdAg 2 Mg and RE AgAuMg ( RE =Gd, Tb, Dy)
    Walter de Gruyter GmbH ; 2018
    In:  Zeitschrift für Naturforschung B Vol. 73, No. 10 ( 2018-10-25), p. 739-747
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 73, No. 10 ( 2018-10-25), p. 739-747
    Abstract: The magnetocaloric effect (MCE) of the ferromagnetic compound GdAg 2 Mg [ T C =98.3(5) K] was investigated along with its electrical resistivity and the specific heat capacity. The magnetic entropy changes (–Δ S M ) as well as the changes in adiabatic temperature (Δ T ad ) have been calculated from these data. Furthermore, the magnetic susceptibility of the pseudo-quaternary Heusler phases GdAgAuMg, TbAgAuMg and DyAgAuMg [i.e. RE (Ag 0.5 Au 0.5 ) 2 Mg] were measured and compared to the data for the pure silver and gold compounds RE Ag 2 Mg and RE Au 2 Mg. The substitution of the transition metal at the crystallographic Wyckoff site 8 c influences the magnetic ground state of the trivalent rare earth metals and therefore drastically alters the Curie temperatures. The structure of GdAgAuMg was refined from single crystal X-ray diffraction data, revealing a small deviation from the equiatomic composition leading to the refined formula GdAg 0.92(6) Au 1.08(6) Mg [space group Fm 3̅ m , Z =4, a =695.03(10) pm, wR 2=0.0883, 55 F 2 values, six parameters]. The intermetallic compounds were synthesised in sealed niobium ampoules under high temperature conditions. They have reddish to brassy colour.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2018-0151
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 7
    Online Resource
    Online Resource
    Rare earth-copper-magnesium intermetallics: crystal structure of CeCuMg, magnetocaloric effect of GdCuMg and physical properties of the Laves phases RE Cu 4 Mg ( RE =Sm, Gd, Tb, Tm)
    Walter de Gruyter GmbH ; 2018
    In:  Zeitschrift für Naturforschung B Vol. 73, No. 12 ( 2018-12-19), p. 987-997
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 73, No. 12 ( 2018-12-19), p. 987-997
    Abstract: The intermetallic magnesium compounds CeCuMg and GdCuMg as well as the ternary Laves phases RE Cu 4 Mg ( RE =Sm, Gd–Tm) were synthesized from the elements by different annealing sequences in high-frequency and muffle furnaces using niobium ampoules as crucibles. All samples were characterized through the lattice parameters using X-ray powder diffraction (Guinier technique). Two structures were refined from single-crystal X-ray diffractometer data: a =764.75(6), c =414.25(4) pm, space group P 6̅2 m , wR 2=0.0389, 338 F 2 values, 15 parameters for CeCuMg (ZrNiAl type) and a =723.18(2) pm, space group F 4̅3 m, wR 2=0.0818, 91 F 2 values, eight parameters for Gd 1.06(3) Cu 4 Mg 0.94(3) (MgCu 4 Sn type). The Laves phase shows a small homogeneity range (Gd/Mg mixing). An investigation of the magnetocaloric effect (MCE) of ferromagnetic GdCuMg (ZrNiAl type; T C =82 K) revealed a magnetic entropy change of Δ S M =6.5 J kg −1 K −1 and a relative cooling power of RCP=260 J kg −1 for a field change from 0 to 70 kOe, classifying GdCuMg as a moderate magnetocaloric material for the T =80 K region. Of the Laves phases RE Cu 4 Mg, SmCu 4 Mg shows van-Vleck paramagnetism above a Néel temperature of 10.8(5) K, whereas GdCu 4 Mg and TbCu 4 Mg undergo antiferromagnetic phase transitions at about 48 and 30 K, respectively. TmCu 4 Mg shows Curie-Weiss behavior in the entire temperature range. The electrical resistivity of SmCu 4 Mg and the specific heat capacity of GdCu 4 Mg were measured for further characterization.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2018-0191
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 8
    Online Resource
    Online Resource
    The alkaline earth-palladium-germanides Sr 3 Pd 4 Ge 4 and BaPdGe
    Walter de Gruyter GmbH ; 2018
    In:  Zeitschrift für Naturforschung B Vol. 73, No. 3-4 ( 2018-4-25), p. 243-250
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 73, No. 3-4 ( 2018-4-25), p. 243-250
    Abstract: The germanides Sr 3 Pd 4 Ge 4 and BaPdGe were obtained from high-temperature reactions in sealed niobium ampoules and their structures have been determined from single-crystal X-ray diffraction data: a =444.2(1), b =438.1(1), c =2472.2(7) pm, space group Immm , U 3 Ni 4 Si 4 type, wR 2=0.0471, 576 unique reflections, 25 parameters for Sr 3 Pd 4 Ge 4 and a =677.09(8), space group P 2 1 3, LaIrSi type, wR 2=0.0322, 409 unique reflections, nine parameters for BaPdGe. Both germanides have pronounced three-dimensional [Pd 4 Ge 4 ] δ − and [PdGe] δ − polyanionic networks with Pd–Ge bonding interactions. This is confirmed by the density functional theory (DFT)-based electronic structure investigations, the trends of charge transfer and crystal orbital overlap population (COOP) analyses.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2018-0005
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 9
    Online Resource
    Online Resource
    Structure, Magnetic Properties and 151 Eu, 119 Sn Mössbauer Spectroscopy of Eu 5 Sn 3 S 12 and Eu 4 LuSn 3 S 12
    Walter de Gruyter GmbH ; 2007
    In:  Zeitschrift für Naturforschung B Vol. 62, No. 1 ( 2007-1-1), p. 5-14
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 62, No. 1 ( 2007-1-1), p. 5-14
    Abstract: Eu 5 Sn 3 S 12 and Eu 4 LuSn 3 S 12 were synthesized and their structures refined from single crystal data (Pmc2 1 , Eu 5 Sn 3 S 12 : a = 3.908(1), b = 20.115(4), c = 11.451(2) Å ; wR2 = 0.0519 for 3048 F 2 and 122 parameters; Eu 4 LuSn 3 S 12 : a = 3.920(1), b = 20.132(4), c = 11.459(2) Å ; wR2 = 0.0737 for 3298 F 2 and 122 parameters). The structures contain one-dimensional chains of edge-sharing SnS 2 S 4/2 octahedra and corner-sharing SnS3S2/2 trigonal bipyramids, running parallel to [100]. Five europium sites are seven- or eightfold coordinated by sulfur atoms. Lutetium atoms in Eu 4 LuSn 3 S 12 show a strong site preference for one of the two Eu 3+ positions of Eu 5 Sn 3 S 12 and no structural disorder was observed. Both compounds show static mixed valence according to Eu 2+ 3 Eu 3+ 2 Sn 4+ 3 S 2− 12 and Eu 2+ 3 Eu 3+ Lu 3+ Sn 4+ 3 S 2− 12 , which was confirmed by temperature dependent magnetic susceptibility measurements. The experimental magnetic moments of 14.6(1) (Eu 5 Sn 3 S 12 ) and 14.1(1) (Eu 4 LuSn 3 S 12 ) μ B /f.u. indicate that each of the two sulfides contains three divalent europium atoms per formula unit. Magnetic ordering for Eu 5 Sn 3 S 12 and Eu 4 LuSn 3 S 12 sets in below 5 and 3 K, respectively. Both sulfides show metamagnetic or spin-flip transitions in the magnetization curves at 3 K (2 K) with full saturation of the europium magnetic moments at 3 K (2 K) and 80 kOe. 151 Eu Mössbauer spectra fully confirm the Eu 2+ and Eu 3+ site occupancies. At 4.2 K an increase in line width indicates small hyperfine fields at the europium nuclei.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2007-0102
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2007
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 10
    Online Resource
    Online Resource
    GdCuMg with ZrNiAl-type structure – an 82.2 K ferromagnet
    Walter de Gruyter GmbH ; 2017
    In:  Zeitschrift für Naturforschung B Vol. 72, No. 7 ( 2017-6-27), p. 511-515
    Details
    In: Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 72, No. 7 ( 2017-6-27), p. 511-515
    Abstract: GdCuMg has been synthesized by induction-melting of the elements in a sealed niobium ampoule followed by annealing in a muffle furnace. The sample was studied by powder and single crystal X-ray diffraction: ZrNiAl type, P 6̅2 m ( a =749.2(4), c =403.3(1) pm), wR 2=0.0242, 315 F 2 values and 15 variables. Temperature dependent magnetic susceptibility measurements have revealed an experimental magnetic moment of 8.54(1) μ B per Gd atom. GdCuMg orders ferromagnetically below T C =82.2(5) K and based on the magnetization isotherms it can be classified as a soft ferromagnet.
    Type of Medium: Online Resource
    ISSN: 1865-7117 , 0932-0776
    URL: Article
    DOI: 10.1515/znb-2017-0070
    RVK:
    WA 15000
    RVK:
    VA 8360
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2017
    detail.hit.zdb_id: 2078109-X
    detail.hit.zdb_id: 124635-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...