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  • AIP Publishing  (5)
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  • AIP Publishing  (5)
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  • 1
    Online Resource
    Online Resource
    Room-temperature ferromagnetism induced and controlled by electric field in BaNbO3 films
    AIP Publishing ; 2012
    In:  Applied Physics Letters Vol. 101, No. 23 ( 2012-12-03)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 101, No. 23 ( 2012-12-03)
    Abstract: The application of electric field can induce the room-temperature ferromagnetism (FM) in paramagnetic BaNbO3 films on the conductive Nb:SrTiO3 substrate. The electric field-induced ferromagnetism in BaNbO3 is connected with the hybridization between electrons of Nb-4d1 and the injected electrons from the conductive substrate, possibly leading to large density of states at the Fermi level and satisfying the Stoner criterion for ferromagnetism. By application of electric field in forward and reversed directions, the magnetization of electric field-induced FM can be adjusted in some extent. The application of electric field can also enhance the oxygen vacancies-induced room-temperature ferromagnetism in BaNbO3 films.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4769901
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Magnetic properties of transition metal doped AlN nanosheet: First-principle studies
    AIP Publishing ; 2014
    In:  Journal of Applied Physics Vol. 115, No. 5 ( 2014-02-07)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 115, No. 5 ( 2014-02-07)
    Abstract: We carry out our first-principles calculations within density functional theory to study the 3d transition metal (TM) doped AlN nanosheets. The calculated results indicate that a stoichiometric AlN nanosheet is graphene-like structure and nonmagnetic. The TM impurities can induce magnetic moments, localized mainly on the 3d TM atoms and neighboring N atoms. Our calculated results of TM-doped nanosheet systems indicate a strong interaction between 3d orbit of TM atom and the 2p orbit of N atoms. In addition, the Mn- and Ni-doped AlN nanosheet with half-metal characters seems to be good candidates for spintronic applications. When substituting two Al atoms, the relative energies of the states between ferromagnetic and antiferromagnetic coupling are investigated sufficiently. The exchange coupling of Co- and Ni-doped AlN nanosheets exhibits a transformation with different distances of two TM atoms and that of Cr-, Mn-, and Fe-doped AlN nanosheets is not changed.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4864262
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 3
    Online Resource
    Online Resource
    Room-temperature magnetoelectric coupling in nanocrystalline Na0.5Bi0.5TiO3
    AIP Publishing ; 2014
    In:  Journal of Applied Physics Vol. 116, No. 8 ( 2014-08-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 116, No. 8 ( 2014-08-28)
    Abstract: Nanocrystalline Na0.5Bi0.5TiO3 was prepared by sol-gel method. The nanocrystalline Na0.5Bi0.5TiO3 plates present room temperature ferromagnetism (FM). The reduction of FM for the plate with subsequent long time and high temperature air-annealing indicating that the observed ferromagnetism is connected with the vacancies at/near the surface of nanograins. For Na0.5Bi0.5TiO3 powders after annealing at 900 °C in air, a subsequent annealing in vacuum at 900 °C for 20 min weakens the room-temperature FM, but a subsequent annealing in oxygen atmosphere at 900 °C for 20 min enhances the room-temperature FM, which means that the observed FM in nanocrystalline Na0.5Bi0.5TiO3 may originate from cation vacancy at/near the surface of nanograins. The results of density functional theory calculation with the local density approximation plus on-site effect (LDA + U) method on the magnetism of Na0.5Bi0.5TiO3 (100) surface show that Na vacancies can introduce a nonzero magnetic moment. The Na0.5Bi0.5TiO3 plates annealed at 900 °C for 1 h present d0 multiferroicity with the coexistence of ferromagnetism and ferroelectricity at room temperature. The room-temperature magnetodielectric effect was observed in Na0.5Bi0.5TiO3 plates. In addition, the electric field treatment leads to an enormous enhancement of saturation magnetization for Na0.5Bi0.5TiO3 multiferroic plate, showing a strong magnetoelectric coupling.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4893720
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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  • 4
    Online Resource
    Online Resource
    Background-independent evaluation model for infrared jamming effectiveness of false targets
    AIP Publishing ; 2022
    In:  AIP Advances Vol. 12, No. 11 ( 2022-11-01)
    Details
    In: AIP Advances, AIP Publishing, Vol. 12, No. 11 ( 2022-11-01)
    Abstract: Given the lack of a standardized evaluation system for the infrared jamming effectiveness of false targets, this paper first uses a co-saliency detection model to extract the main parts of the true and false targets. Then the perceptual similarity algorithm is improved by combining the operational requirements of false targets in the infrared band. Finally, a background-independent evaluation model for infrared jamming effectiveness of false targets is constructed. The experimental results show that the model can quantitatively reflect the infrared jamming effectiveness of a single false target and distinguish the infrared jamming effectiveness of different types of false targets. In addition, the model has stronger robustness than traditional evaluation models.
    Type of Medium: Online Resource
    ISSN: 2158-3226
    URL: Article
    DOI: 10.1063/5.0120469
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 2583909-3
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  • 5
    Online Resource
    Online Resource
    Magnetoelectric coupling in nanocrystalline Pb0.82La0.18TiO3
    AIP Publishing ; 2012
    In:  Applied Physics Letters Vol. 101, No. 2 ( 2012-07-09)
    Details
    In: Applied Physics Letters, AIP Publishing, Vol. 101, No. 2 ( 2012-07-09)
    Abstract: The combined effect of Pb vacancies and La dopant can induce ferromagnetism below 75 K for Pb0.82La0.18TiO3 plates annealed at 700,1000, and 1200 °C for 1 h. Pb0.82La0.18TiO3 plates annealed at 1000 °C for 1 h show the coexistence of ferromagnetism resulting from oxygen vacancies at/near surfaces of nanograins and ferroelectricity near room temperature. Under application of magnetic field, the dielectric constant decreases and the ferroelectric transition temperature shifts to high temperature for Pb0.82La0.18TiO3 multiferroic plates. In addition, the electric field treatment leads to an enormous enhancement of saturation magnetization for Pb0.82La0.18TiO3 multiferroic plates, showing a strong magnetoelectric coupling.
    Type of Medium: Online Resource
    ISSN: 0003-6951 , 1077-3118
    URL: Article
    DOI: 10.1063/1.4732803
    RVK:
    UA 1000
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 211245-0
    detail.hit.zdb_id: 1469436-0
    Location Call Number Limitation Availability
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    Online Resource
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