Precise magnetization measurements of a half-metallic ferromagnet ${\mathrm{Co}}_2\mathrm{TiSn}$ with the Heusler type structure have been carried out under pressure up to 1.27 GPa. At ambient pressure, the spontaneous magnetic moment $M_{\mathrm{s}}^{\exp }$ and the Curie temperature $T_{\mathrm{C}}^{\exp }$ are experimentally obtained to be $1.993\left(3\right){\mu }_{\mathrm{B}}$/f.u. and $376.76\left(7\right)$ K, respectively. The $M_{\mathrm{s}}^{\exp }$ is independent of applying pressure. The $T_{\mathrm{C}}^{\exp }$ decreases with the increase of pressure and the pressure derivative of the Curie temperature $d{T}_{\mathrm{C}}^{\exp }/dp$ is estimated to be $-3.15\left(9\right)$ K/GPa. Furthermore, the pressure effect on the electronic and magnetic properties of ${\mathrm{Co}}_2\mathrm{TiSn}$ has been theoretically investigated on the basis of first-principles density functional calculations by using the projector augmented wave method in order to evaluate the half metallicity of ${\mathrm{Co}}_2\mathrm{TiSn}$. Both the experimental and the theoretical results under pressure reveal that ${\mathrm{Co}}_2\mathrm{TiSn}$ is half metal. The experimental results of pressure-dependent magnetic properties are finally discussed on the basis of the spin fluctuation theory for itinerant electron magnetism.

中文翻译：

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压力对半金属Heusler合金Co2TiSn磁性能的影响

半金属铁磁体的精确磁化测量 ${\mathrm{有限公司}}_{\mathrm{2个}}\mathrm{钛锡}$具有Heusler型结构的设备已在高达1.27 GPa的压力下进行。在环境压力下，自发的磁矩${\mathrm{中号}}_{\mathrm{s}}^{\mathrm{经验值}}$ 和居里温度 ${Ť}_{\mathrm{C}}^{\mathrm{经验值}}$ 通过实验获得 $1.993（3）{\mu }_{\mathrm{乙}}$/ fu和 $376.76（7）$分别为K。这${\mathrm{中号}}_{\mathrm{s}}^{\mathrm{经验值}}$与施加压力无关。这${Ť}_{\mathrm{C}}^{\mathrm{经验值}}$ 随压力的增加和居里温度的压力导数而减小 $d{Ť}_{\mathrm{C}}^{\mathrm{经验值}}/dp$ 估计是 $-3.15（9）$K / GPa。此外，压力对合金的电子和磁性的影响${\mathrm{有限公司}}_{\mathrm{2个}}\mathrm{钛锡}$ 在理论上根据第一原理密度函数计算，通过使用投影机增强波方法进行了研究，以评估金属的半金属性。 ${\mathrm{有限公司}}_{\mathrm{2个}}\mathrm{钛锡}$。在压力下的实验和理论结果都表明：${\mathrm{有限公司}}_{\mathrm{2个}}\mathrm{钛锡}$是半金属。最后，基于自旋涨落理论对迭代电子磁的压力依赖性磁性能的实验结果进行了讨论。