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首页> 外文期刊>Journal of Applied Physics >Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L1_0-MnGa/Co_2FeAl Heusler bilayers
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Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L1_0-MnGa/Co_2FeAl Heusler bilayers

机译:垂直磁化的L1_0-MnGa / Co_2FeAl Heusler双层中的可调铁磁和反铁磁界面交换耦合

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摘要

In this work, we report a tailorable exchange coupling (J_(ex)) at the Mn_(62)Ga_(38)/Co_2FeAl interface, where Mn_(62)Ga_(38) and Co_2FeAl alloys are tetragonal Heusler alloy with high perpendicular magnetic anisotropy and typical cubic Heusler alloy with soft magnetism, respectively. As the post annealing temperature (T_a) is lower than 375 ℃, the J_(ex) is ferromagnetic with strength controllable from 7.5 to 0.5 erg/cm~2. Interestingly, as T_a increases higher than 400 ℃, an antiferromagnetic J_(ex) of -5.5 erg/cm~2 is observed. The ferromagnetic/antiferromagnetic transition is further evidenced by the spin dependent transport property of the magnetic tunnel junctions with Mn_(62)Ga_(38)/Co_2FeAl as electrode. Based on structure characterization, the variation of J_(ex) during annealing is discussed.
机译:在这项工作中,我们报告了在Mn_(62)Ga_(38)/ Co_2FeAl界面处的可定制交换耦合(J_(ex)),其中Mn_(62)Ga_(38)和Co_2FeAl合金是具有高垂直磁性的四方Heusler合金各向异性和典型的具有软磁性的立方Heusler合金。当后退火温度(T_a)低于375℃时,J_(ex)是铁磁性的,强度可控制在7.5到0.5 erg / cm〜2之间。有趣的是,随着T_a升高至高于400℃,反铁磁J_(ex)为-5.5 erg / cm〜2。以Mn_(62)Ga_(38)/ Co_2FeAl为电极的磁性隧道结的自旋相关输运性质进一步证明了铁磁/反铁磁跃迁。基于结构表征,讨论了退火过程中J_(ex)的变化。

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  • 来源
    《Journal of Applied Physics》 |2014年第23期|233904.1-233904.5|共5页
  • 作者单位

    WPI Advanced Institute for Materials Research, Tohoku University, 2-1 -1, Katahira, 980-8577 Sendai, Japan;

    WPI Advanced Institute for Materials Research, Tohoku University, 2-1 -1, Katahira, 980-8577 Sendai, Japan;

    WPI Advanced Institute for Materials Research, Tohoku University, 2-1 -1, Katahira, 980-8577 Sendai, Japan;

    WPI Advanced Institute for Materials Research, Tohoku University, 2-1 -1, Katahira, 980-8577 Sendai, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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