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首页> 外文期刊>Thin Solid Films >Epitaxial growth and exchange coupling of spinel ferrimagnet Ni_(0.3)Zn_(0.7)Fe_2O_4 on multiferroic BiFeO_3
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Epitaxial growth and exchange coupling of spinel ferrimagnet Ni_(0.3)Zn_(0.7)Fe_2O_4 on multiferroic BiFeO_3

机译：尖晶石型铁磁体Ni_（0.3）Zn_（0.7）Fe_2O_4在多铁性BiFeO_3上的外延生长和交换耦合

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摘要

Thin films of the zinc nickel ferrite, Zno,7Ni_(0.3)Zn_(0.7)Fe_2O_4 (ZNFO), were deposited by the RF magnetron sputtering on a number of substrates, including (001) oriented single crystals of LaAlO_3 (LAO) and SrTiO_3 (STO), polycrystalline Ft/Si, and epitaxial films of BiFeO_3 (BFO) and LaNiO3 (LNO). Except for the films on Pt/Si, the ZNFO films grown on other substrates were epitaxial and their magnetic properties were affected by the heteroepitaxy induced strains. Typically, the coercivity (H_c) was increased with the strain, i.e. H_c varied from 31 Oe for the 150 nm thick polycrystalline films grown on Pt/Si, to 55 Oe and 155 Oe for the 20 nm thick epitaxial films grown on BFO and LAO, respectively. The saturation magnetization of the epitaxial films was reduced accordingly to about 470 emu/cm~3 from 986 emu/cm~3 in the polycrystalline films. The all-oxide architecture allowed field-annealing to perform at the temperature above the Neel temperature of BFO (-370 ℃), after which clear exchange bias was observed.
机译：锌镍铁氧体薄膜Zno，7Ni_（0.3）Zn_（0.7）Fe_2O_4（ZNFO）的薄膜通过RF磁控溅射沉积在许多衬底上，包括LaAlO_3（LAO）和SrTiO_3的（001）取向单晶。 （STO），多晶Ft / Si以及BiFeO_3（BFO）和LaNiO3（LNO）的外延膜。除了在Pt / Si上的薄膜外，在其他衬底上生长的ZNFO薄膜都是外延的，并且其磁性能受到异质外延诱导的应变的影响。通常，矫顽力（H_c）随应变而增加，即，H_c从在Pt / Si上生长的150 nm厚的多晶膜的31 Oe变化到在BFO和LAO上生长的20 nm的外延膜的55 Oe和155 Oe。 ， 分别。外延膜的饱和磁化强度相应地从多晶膜中的986 emu / cm〜3降低到约470 emu / cm〜3。全氧化物结构允许在高于BFO的Neel温度（-370℃）的温度下进行场退火，此后观察到明显的交换偏压。

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  • 来源
    《Thin Solid Films》 |2011年第23期|p.8326-8329|共4页
  • 作者

    Wei-Jui Lin; Xiaoding Qi; Gung Chern; Jung-Chun-Andrew Huang;

  • 作者单位

    Department of Materials Science and Engineering, National Cheng Kung University, Tainan City 70101, Taiwan;

    Department of Materials Science and Engineering, National Cheng Kung University, Tainan City 70101, Taiwan;

    Department of Physics, National Chung Cheng University, Chiayi County 621, Taiwan;

    Department of Physics, National Cheng Kung University, Tainan City 70101, Taiwan;

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  • 正文语种 eng
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  • 关键词

    BiFeO_3; spinel ferrite; heteroepitaxy; exchange bias;

    机译：BiFeO_3;尖晶石铁氧体异质外延交换偏见;

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