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Large magnetocaloric effect in La 0.845 Sr 0.155 Mn 1− x M x O 3 (M = Mn, Cu, Co) perovskites
Author(s) -
Phan ManhHuong,
Phan TheLong,
Yu SeongCho,
Tho Nguyen Duc,
Chau Nguyen
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200304587
Subject(s) - magnetic refrigeration , paramagnetism , condensed matter physics , magnetization , electron paramagnetic resonance , ferromagnetism , materials science , magnetic field , physics , nuclear magnetic resonance , quantum mechanics
We present the results of an investigation on the magnetocaloric effect in the perovskites of La 0.845 Sr 0.155 Mn 1− x M x O 3 (M = Mn, Cu, Co). It is found that there was a large magnetic entropy change, i.e. a large magneto‐caloric effect, in all these samples. Among them, the magnetic entropy change reaches a maximum value of 2.67 J/kg K at the applied field of 13.5 kOe for the Cu‐doped sample, suggesting that this material would be a suitable candidate for the advanced magnetic refrigeration technology. The large magnetic entropy change produced by the abrupt reduction of magnetization is attributed to the strong coupling between spin and lattice that occurs in the vicinity of the ferromagnetic‐paramagnetic transition temperature ( T C ) – which is experimentally verified by electron paramagnetic resonance study. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)