Open AccessThe effect of electric pulses on the specific heat of polycrystalline La0.7Ca0.3MnO3
Author(s) -
Zhihua Wu,
Huaqing Xie
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.2703
Subject(s) - crystallite , condensed matter physics , materials science , ferromagnetism , magnetization , specific heat , spin wave , charge carrier , magnetic field , physics , quantum mechanics , metallurgy
The specific heat of polycrystalline La0.7Ca0.3MnO3 at different resistance states induced by electric pulses was studied. It was found that the specific heat decreases with decreasing resistance, and the change is reversible. The reversible change of specific heat was shown to be mainly due to the ferromagnetic-spin-waves component and charge carriers component by fitting the specific heat data. These results indicate that the electric pulses modulated the magnetic configuration of LCMO at low temperature, which would result in large variation in magnetization and specific heat associated with ferromagnetic-spin-waves.