First Observation of Low-Temperature Magnetic Transition in CuAgSe

Authors

Chao Han, University of WollongongFollow
Qingping Ding, Iowa State University
Lijuan Zhang, University of WollongongFollow
Weijie Li, University of WollongongFollow
Jian Li Wang, University of WollongongFollow
Qinfen Gu, Australian Synchrotron Company
Qiao Sun, Soochow UniversityFollow
Yuji Furukawa, Iowa State University
Shi Xue Dou, University of WollongongFollow
Zhenxiang Cheng, University of WollongongFollow
Zhen Li, University of Wollongong, Soochow UniversityFollow

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