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Title: Magnetic fingerprints of the very fast jumps of colossal magnetoresistance in the phase-separated manganite La0.225Pr0.40Ca0.375MnO3
Author: Macià Bros, Ferran
Abril, Guillem
Hernández Mínguez, Alberto
Hernández Ferràs, Joan Manel
Tejada Palacios, Javier
Parisi, F.
Keywords: Materials magnètics
Propietats magnètiques
Magnetic materials
Magnetic properties
Issue Date: 2008
Publisher: The American Physical Society
Abstract: We found that colossal variations of resistance in La 0.225 Pr 0.40 Ca 0.375 Mn O 3 in about 100 μ s occur simultaneously with magnetic avalanches that last about 1 ms . These findings are interpreted as macroscopic fingerprints of the percolative phase separation upon application of the external magnetic field. Depending on the fraction of the ferromagnetic phase x , the colossal magnetoresistance jumps appear to be caused either by fluctuations of x , accompanied by fast propagation of the magnetic avalanches through the sample, or by a phase transition from charge ordered antiferromagnetic phase to charge delocalized ferromagnetic phase.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 2008, vol. 77, núm 1, p. 012403-1-012403-4
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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