Static critical behavior of the ferromagnetic transition in LaMnO3.14 manganite

[摘要] The ferromagnetic phase transition in LaMnO3.14 is investigated by measuring the DC magnetization as a function of magnetic field and temperature. Modified Arrott plot and Kouvel-Fisher analysis yield estimates for the critical exponents beta, and gamma, with values between the predicted for the Heisenberg model and mean-field theory. At low fields we found an anomalous small value of beta, indicating that the critical behavior is influenced by the range of magnetic fields used. (C). 2001 Elsevier Science B.V. All rights reserved.

[发布日期] 2001-05-01

[效力级别]  Proceedings Paper

[关键词] manganite;critical phenomena;exponents;phase transitions-ferro-paramagnetic