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  • AIP Publishing  (2)
  • 1
    Online Resource
    Online Resource
    Magnetic and electrical transport properties of Pb1- x La x Ti1- x Mn x O3 ceramics
    AIP Publishing ; 2012
    In:  AIP Advances Vol. 2, No. 3 ( 2012-09-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 2, No. 3 ( 2012-09-01)
    Abstract: Pb1-xLaxTi1-xMnxO3 (PLTM100x, x = 0.20, 0.40, 0.50, 0.60, and 0.80) ceramics have been prepared and investigated. X-ray diffractions show all ceramics are crystallized into perovskite structures with tetragonal symmetry for PLTMO20 and orthorhombic symmetry for the other compositions. X-ray photoelectron spectroscopy results confirm that the Mn cations in PLTMO20 and PLTMO40 have the valence state of +3, whereas in other compositions, the Mn cations have mixed valences states of +3 and +4. With increasing x from 0.20 to 0.80, the materials change from superparamagnetic to coexisting ferromagnetic and antiferromagnetic magnetic behaviour whereas all compositions persist insulating behaviour, as confirmed by the magnetization-magnetic field (M-H), the temperature dependent magnetization (M-T) and transport measurements. Especially, the PLTMO80 has a large negative magnetoresistance of −41.5% at 10 K with the applied filed of 2 T. By considering the chemical states of Mn cations, these results are attributed to that the coexistence of metallic ferromagnetic and insulating non-ferromagnetic phases.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/1.4749254
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 2583909-3
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Laser-driven shock wave stability in Al through Au and determination of the TPa hugoniot point in Au
    AIP Publishing ; 2008
    In:  Journal of Applied Physics Vol. 103, No. 9 ( 2008-05-01)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 103, No. 9 ( 2008-05-01)
    Abstract: High-quality shock waves were produced using the ninth laser beam (converted to 2ω) of Shenguang-II laser facility and the beam smoothing technology of a lens array. The spatial uniformity of the shock wave was estimated by measurements of the self-emission from the target rear surface. An Al–Au four-step target with 30μm Al base and four Au steps was fabricated and used to investigate the temporal steadiness of the shock wave in the Al–Au two-layer target. The Al–Au four-step target experiment indicated that the shock wave steadily propagated in the Au material with thickness range & lt;11μm. A modified Al–Au impedance-match target was designed, which could simultaneously measure shock-wave stability and Au Hugoniot data in one shot. The experiment results indicated that the shock wave steadily propagated in the Al target with thickness of about 30–47μm under a power density of ∼1.0×1014W∕cm2.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.2838164
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2008
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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