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arXiv · 1806.00575

Prolonged mixed phase induced by high pressure in MnRuP

Raimundas Sereika·Wei Wu·Changyong Park·Curtis Kenney-Benson·Dale L. Brewe·Steve M. Heald·Jianbo Zhang·Sorb Yesudhas·Hongshan Deng·Bijuan Chen·Jianlin Luo·Yang Ding·Ho-kwang Mao
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Abstract

Hexagonally structured MnRuP was studied under high pressure up to 35 GPa from 5 to 300 K using synchrotron X-ray diffraction. We observed that a partial phase transition from hexagonal to orthorhombic symmetry started at 11 GPa. The new and denser orthorhombic phase coexisted with its parent phase for an unusually long pressure range, {\Delta}P ~ 50 GPa. We attribute this structural transformation to a magnetic origin, where a decisive criterion for the boundary of the mixed phase lays in the different distances between the Mn-Mn atoms. In addition, our theoretical study shows that the orthorhombic phase of MnRuP remains steady even at very high pressures up to ~ 250 GPa, when it should transform to a new tetragonal phase.

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Raimundas Sereika, Wei Wu, Changyong Park, Curtis Kenney-Benson, Dale L. Brewe, Steve M. Heald, Jianbo Zhang, Sorb Yesudhas, Hongshan Deng, Bijuan Chen, Jianlin Luo, Yang Ding, Ho-kwang Mao. 2018-06-02. Prolonged mixed phase induced by high pressure in MnRuP. https://doi.org/10.1103/physrevb.97.214103

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