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First Observation of Low-Temperature Magnetic Transition in CuAgSe

TitleFirst Observation of Low-Temperature Magnetic Transition in CuAgSe
Publication TypeJournal Article
Year of Publication2018
AuthorsHan, C, Ding, QP, Zhang, LJ, Li, WJ, Wang, JL, Gu, QF, Sun, Q, Furukawa, Y, Dou, SX, Cheng, ZX, Li, Z
JournalJournal of Physical Chemistry C
Date Published08
Type of ArticleArticle
ISBN Number1932-7447
Accession NumberWOS:000442960300040
Keywordscancer, chemistry, guided photothermal therapy, Materials Science, nanoparticles, order, scalable synthesis, Technology - Other Topics

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 the structural phase transition.

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Alternate JournalJ. Phys. Chem. C