Pressure Tuning of Collapse of Helimagnetic Structure in Au2Mn

Published

November 27, 2017

Author(s)

I Lin NMN Liu, Maria J. Pascale, Juscelino Leao, Craig Brown, William D. Ratcliff, Qingzhen Huang, Nicholas Butch

Abstract

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 and transition width narrows with increasing temperature and pressure. The critical pressure separating the spiral phase and ferromagnetism coincides with disappearance of the magnetroresistance peak, where the critical field goes to zero. The notable absence of an anomalous Hall effect in the ferromagnetic phase is attributable to the high conductivity of this material.

Citation

Physical Review B

Volume

96

Issue

18

Pub Type

Journals

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Keywords

helimagnet, pressure, quantum critical point

Citation

Liu, I. , Pascale, M. , Leao, J. , Brown, C. , Ratcliff, W. , Huang, Q. and Butch, N. (2017), Pressure Tuning of Collapse of Helimagnetic Structure in Au₂Mn, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=924314 (Accessed October 28, 2025)