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Isothermal Magnetic Phase Transitions Controlled by Reversible Electron/Ion Transfer Reactions
Author(s) -
Schöllhorn Robert,
Payer Andreas
Publication year - 1986
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198609051
Subject(s) - ferromagnetism , copper , isothermal process , paramagnetism , materials science , ion , electron transfer , phase (matter) , electrolyte , phase transition , magnetization , condensed matter physics , chemical physics , chemistry , thermodynamics , metallurgy , electrode , magnetic field , physics , organic chemistry , quantum mechanics
The ferromagnetic copper chromoselenospinel CuCr 2 Se 4 might serve as the basis for a chemically controlled magentic switch . In copper‐containing electrolytes it can be transformed at 300 K into the cubic, nonstoichiometric phases Cu 1 + y Cr 2 Se 4 (O ≤ y ≤ 1). At a critical value, y c , the system undergoes a ferromagnetic/paramagnetic phase transition. Since the uptake of copper is a reversible process, this chemical reaction can be used to change the magetic properties. Similar reactions have been observed for the ferromagentic phases CuCr 2 S 4 and CuCr 2 Te 4 .
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