First Observation of Low-Temperature Magnetic Transition in CuAgSe
Author(s) -
Chao Han,
Qing-Ping Ding,
Lijuan Zhang,
Weijie Li,
Jianli Wang,
Qinfen Gu,
Qiao Sun,
Yuji Furukawa,
Shi Xue Dou,
Zhenxiang Cheng,
Zhen Li
Publication year - 2018
Publication title -
the journal of physical chemistry c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.401
H-Index - 289
eISSN - 1932-7455
pISSN - 1932-7447
DOI - 10.1021/acs.jpcc.8b04061
Subject(s) - diamagnetism , ferromagnetism , condensed matter physics , atmospheric temperature range , antiferromagnetism , materials science , impurity , transition temperature , neutron diffraction , phase transition , valence (chemistry) , chemistry , magnetic field , crystallography , crystal structure , thermodynamics , physics , superconductivity , organic chemistry , quantum mechanics
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.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom