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

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

2000-10-06

arxiv.org/abs/cond-mat/0010108v1

Physics

Condensed Matter

Statistical Mechanics

Presented at ICM 2000 conference. Accepted for publication at J. Magn. Magn. Mater

Scientific paper

10.1016/S0304-8853(00)00683-1

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 gama, with values between that 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.

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