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Abstract: At low frequencies ?=300Hz, nonlinear magnetic susceptibility of polycrystalline La;bsubesubbsubesubbsubesub&(Co, Ni);bsubesubbsubesub& samples near the ferromagnetic (FM)-paramagnetic (PM) phase transition reinforces the earlier observation, based on linear ac susceptibility, that these systems behave as a three-dimensional isotropic dipolar ferromagnet in the asymptotic critical regime and exhibit an isotropic dipolar to isotropic Heisenberg crossover. In addition, the nonlinear susceptibility results reveal the phase segregation of the conducting and insulating FM phases (clusters) within the conducting FM regime and existence of conducting FM clusters in the insulating PM matrix at high frequencies. © 2014 Elsevier B.V.
Autoría: Bitla Y., Kaul S., Fernández Barquín L.,
Fuente: Physica B: Condensed Matter. Volume 448, 1 September 2014, Pages 223–225
Editorial: Elsevier
Fecha de publicación: 01/09/2014
Nº de páginas: 3
Tipo de publicación: Artículo de Revista
DOI: 10.1016/j.physb.2014.03.059
ISSN: 0921-4526,1873-2135
Url de la publicación: http://www.sciencedirect.com/science/article/pii/S0921452614002270
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BITLA, Y.
SHARIKA NANDAN KAUL
LUIS FERNANDEZ BARQUIN
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