Title

First Observation of Low-Temperature Magnetic Transition in CuAgSe

RIS ID

129849

Publication Details

Han, C., Ding, Q., Zhang, L., Li, W., Wang, J., Gu, Q., Sun, Q., Furukawa, Y., Dou, S., Cheng, Z. & Li, Z. (2018). First Observation of Low-Temperature Magnetic Transition in CuAgSe. The Journal of Physical Chemistry C: Energy Conversion and Storage, Optical and Electronic Devices, Interfaces, Nanomaterials, and Hard Matter, 122 (33), 19139-19145.

Abstract

In this Article, the temperature-dependent magnetic properties of CuAgSe pellet sintered from surfactant-free CuAgSe nanoparticles synthesized by a wet chemistry method were investigated in the temperature range of 4-300 K. A magnetic transition between diamagnetism and weak ferromagnetism is observed at around 60-70 K. The results from magnetic measurements under different machines/magnetic fields, room-Temperature X-ray photoelectron spectroscopy, and temperature-dependent nuclear magnetic resonance all demonstrate that this magnetic transition is an intrinsic property rather than an effect of impurities. Combining these results with temperature-dependent neutron diffraction, the origin of the weak ferromagnetism is ascribed to a structural crossover-induced canted antiferromagnetism and possible deviation of Cu valence. The transition is strongly dependent on the sintering temperature and pressure, which could induce the structural phase transition.

Grant Number

ARC/DP170104116

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