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首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Mechanism of magnetostructural transformation in multifunctional Mn3GaC
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Mechanism of magnetostructural transformation in multifunctional Mn3GaC

机译:多功能MN3GAC中磁体变换机理

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Mn3GaC undergoes a ferromagnetic to antiferromagnetic, volume discontinuous cubic-cubic phase transition as a function of temperature, pressure, and magnetic field. Through a series of temperature dependent x-ray absorption fine structure spectroscopy experiments at the Mn K and Ga K edge, it is shown that the first order magnetic transformation in Mn3GaC is entirely due to distortions in the Mn sub-lattice and with a very little role for Mn-C interactions. The distortion in the Mn sub-lattice results in long and short Mn-Mn bonds with the longer Mn-Mn bonds favoring ferromagnetic interactions and the shorter Mn-Mn bonds favoring antiferromagnetic interactions. At the first order transition, the shorter Mn-Mn bonds exhibit an abrupt decrease in their length resulting in an antiferromagnetic ground state and a strained lattice. Published by AIP Publishing.
机译:Mn3GAC作为磁场的函数进行反式磁,体积不连续立方相转变的铁磁,体积不连续的立方相转变。 通过在Mn K和Ga K边缘的一系列温度依赖性X射线吸收细结构光谱实验,表明MN3GAC中的第一阶磁变换完全是由于MN子晶格中的扭曲和很少 MN-C相互作用的作用。 Mn子晶格中的变形导致长而短的Mn-Mn键,其较长较长的Mn-Mn键,偏好的铁磁性相互作用和有利于反铁磁相互作用的短MN-Mn键。 在第一阶转变,较短的Mn-Mn键在其长度突然下降,导致反铁磁地和应变晶格。 通过AIP发布发布。

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