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首页> 外文期刊>Physical review >Suppressed magnetic order and non-Fermi-liquid behavior in MnSi thin films under hydrostatic pressure
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Suppressed magnetic order and non-Fermi-liquid behavior in MnSi thin films under hydrostatic pressure

机译：静水压力下MnSi薄膜的磁序和非费米液体行为受到抑制

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摘要

In MnSi thin films the magnetic properties of the B20 compound are influenced by induced uniaxial anisotropy. In comparison to bulk MnSi the critical magnetic fields are enhanced and the Skyrmion phase is found to be enlarged within the magnetic phase diagram. Furthermore the ordering temperature depends on the film thickness reaching 43 K for films of around 10 nm and is considerably higher than in bulk crystals (r_(c.bulk) = 29 K). In bulk MnSi the ordering temperature can be reduced by pressure, where at 1.46 GPa the magnetic order is completely suppressed and a non-Fermi-liquid behavior characterized by a T~(3/2) law of the resistivity is observed. We present resistance measurements on MnSi thin films under applied pressure of up to 3.44 GPa. Qualitatively, the behavior is similar to bulk MnSi. However, the critical pressure is considerably enhanced to 3.1 GPa, which is assumed to be a consequence of strain. At high pressure non-Fermi-liquid behavior evidenced by a T~(3/2) behavior of the resistance is observed up to T_(lin) = 30 K, i. e., in a larger temperature range than for bulk MnSi. Uniaxial anisotropy might play an important role in this breakdown of Fermi-liquid behavior, since it stabilizes nontrivial spin structures.
机译：在MnSi薄膜中，B20化合物的磁性能受诱导的单轴各向异性的影响。与块状MnSi相比，临界磁场得到增强，并且Skyrmion相在磁性相图中被放大。此外，有序温度取决于大约10 nm的薄膜达到43 K的薄膜厚度，并且比体晶体中的高得多（r_（c.bulk）= 29 K）。在块状MnSi中，有序温度可​​以通过压力降低，在1.46 GPa时，磁序被完全抑制，并且观察到以电阻率T〜（3/2）定律为特征的非费米液体行为。我们介绍了在高达3.44 GPa的施加压力下对MnSi薄膜的电阻测量。定性地，该行为类似于块状MnSi。但是，临界压力被显着提高到3.1 GPa，这被认为是应变的结果。在高压下，直到T_（lin）= 30 K，即电阻的T〜（3/2）行为证明了非费米液体行为。例如，在比本体MnSi更大的温度范围内。单轴各向异性可能在费米-液行为的这种分解中起重要作用，因为它稳定了非平凡的自旋结构。

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  • 来源
    《Physical review》 |2014年第14期|144413.1-144413.4|共4页
  • 作者

    J. Engelke; D. Menzel; H. Hidaka; T. Seguchi; H. Amitsuka;

  • 作者单位

    Institut fuer Physik der Kondensierten Materie, Technische Universitaet Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, Germany;

    Institut fuer Physik der Kondensierten Materie, Technische Universitaet Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, Germany;

    Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan;

    Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan;

    Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan;

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  • 正文语种 eng
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  • 关键词

    molecular, atomic, ion, and chemical beam epitaxy; metal and metallic alloys; pressure effects;

    机译：分子;原子;离子和化学束外延;金属和金属合金;压力效应;

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