Publication Date
8-1-2018
Department
Ames Laboratory; Physics and Astronomy
Campus Units
Physics and Astronomy, Ames Laboratory
OSTI ID+
1466351
Report Number
IS-J 9735
DOI
10.1021/acs.jpcc.8b04061
Journal Title
The Journal of Physical Chemistry C
Volume Number
122
Issue Number
33
First Page
19139
Last Page
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.
Language
en
Publisher
Iowa State University Digital Repository, Ames IA (United States)
