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Title: Investigating ferromagnetism and charge order in Bi1-xSrxMnO3(x<0.3)ceramic oxides.
Author: García Muñoz, José Luis
Frontera Beccaria, Carlos
Hervieu, Maryvonne
Giot, Michel
Respaud, M.
Calleja Lázaro, Alberto
Capdevila, X. G.
Keywords: Ferromagnetisme
Minerals de manganès
Manganese ores
Issue Date: 2006
Publisher: Consejo Superior de Investigaciones Científicas (CSIC)
Abstract: The possible coexistence of ferromagnetism and charge/orbital order in Bi3/4Sr1/4MnO3 has been investigated. The manganite Bi0.75Sr0.25MnO3, with commensurate charge balance, undergoes an electronic transition at TCO~600 K that produces a longrange modulation with double periodicity along a and c axis, and unusual anisotropic evolution of the lattice parameters. The previously proposed ferromagnetic properties of this new ordered phase were studied by magnetometry and diffraction techniques. In zero field the magnetic structure is globally antiferromagnetic, ruling out the apparition of spontaneous ferromagnetism. However, the application of magnetic fields produces a continuous progressive canting of the moments, inducing a ferromagnetic phase even for relatively small fields (H<<1 T). Application of pulsed high fields produces a remarkable and reversible spin polarization (under 30 T, the ferromagnetic moment is ~3 ¿B/Mn, without any sign of charge order melting). The coexistence of ferromagnetism and charge order at low and very-high fields is a remarkable property of this system.
Note: Reproducció del document publicat a:[3]233-237.pdf
It is part of: Boletin de la Sociedad Española de Ceramica y Vidrio, 2006, vol. 45, num. 3, p. 233-237
ISSN: 0366-3175
Appears in Collections:Articles publicats en revistes (Ciència dels Materials i Química Física)

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