Pressure tuning of collapse of helimagnetic structure in Au2Mn

Article

关键词: REAL-SPACE OBSERVATION;    MAGNETIZATION PROCESS;    MAGNETORESISTANCE;    MNAU2;    FIELD;   

DOI  :  10.1103/PhysRevB.96.184429

来源: SCIE

【 摘 要 】

We identify the phase boundary between spiral spin and ferromagnetic phases in Au2Mn at a critical pressure of 16.4 kbar, as determined by neutron diffraction, magnetization, and magnetoresistance measurements. The temperature-dependent critical field at a given pressure is accompanied by a peak in magnetoresistance and a step in magnetization. The critical field decreases with increasing temperature and pressure. The critical pressure separating the spiral phase and ferromagnetism coincides with the disappearance of the magnetoresistance peak, where the critical field goes to zero. The notable absence of an anomalous Hall effect in the the ferromagnetic phase is attributable to the high conductivity of this material.

【 授权许可】

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