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Critical Magnetism of the CMR Ruddlesden-Popper Manganite La1.2Sr1.8Mn2O7

Published online by Cambridge University Press:  17 March 2011

Matias Velázquez ,
Alexandre Revcolevschi ,
Jean-Pierre Renard  and
Claire Dupasa
Matias Velázquez
Affiliation:
Laboratoire de Physico-Chimie de l'État Solide, Université de Paris-Sud, 91405 Orsay, France Institut d'Électronique Fondamentale, Département MMS, Université de Paris-Sud, 91405 Orsay, FRANCE
Alexandre Revcolevschi
Affiliation:
Laboratoire de Physico-Chimie de l'État Solide, Université de Paris-Sud, 91405 Orsay, France
Jean-Pierre Renard
Affiliation:
Institut d'Électronique Fondamentale, Département MMS, Université de Paris-Sud, 91405 Orsay, FRANCE
Claire Dupasa
Affiliation:
Institut d'Électronique Fondamentale, Département MMS, Université de Paris-Sud, 91405 Orsay, FRANCE
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Abstract

We present a thermodynamic study of the critical magnetic properties of La1.2Sr1.8Mn2O7, including the determination of the fundamental characteristics of a magnetic system: anisotropy, critical exponents and crossovers in the vicinity of the Curie temperature, TC∼108K. It appears that two-dimensional correlations above TC do not spread very fast, and that thus the critical fluctuations regime occurs in a moderately narrow temperature range, assessing the three- dimensional nature of the ferromagnetic ordering.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 690: Symposium F – Spintronics , 2001 , F9.11
Copyright
Copyright © Materials Research Society 2002

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References

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