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Fe2+ Contents and Magnetocrystalline Anisotropy in Iron Defect LiZnTiMn Ferrites

Published online by Cambridge University Press:  31 January 2011

A. Iglesias ,
J. Balmaseda  and
A. González Arias
A. Iglesias
Affiliation:
Instituto Nacional de Investigaciones Metroló;gicas, Consulado 206 entre Animas y Trocadero, La Habana 10200, Cuba
J. Balmaseda
Affiliation:
Centro Nacional de Investigaciones Científicas, Ave 25 y calle 158, Cubanacán, Playa, Habana 6990, Cuba
A. González Arias*
Affiliation:
Dpto. Física Aplicada, Facultad de Física, Universidad de La Habana, Habana 10400, Cuba
*
a)Address all correspondence to this author. e-mail: arnaldo@ff.oc.uh.cu;gonzalezarias@usa.net
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Abstract

An investigation of the effects of the iron defect k in LiZnTiMn ferrites using Mössbauer spectroscopy and ferromagnetic resonance techniques was carried out in single-phased samples. Results show that the isomer shifts have values corresponding to a compound with either low-spin Fe(II), low-spin Fe(III), or high-spin Fe(III). On the other hand, the Lande factor and the ferromagnetic resonance linewidth disclosed that g is always very close to 2, being equal to 2.02 when k = 0.06. A minimum in ΔH was detected for this value of k. From these results, the possible presence of Fe2+ in the samples could be excluded, and it was concluded that the changes in ΔH are due to the variation of the Fe(III) contents in the tetrahedral and octahedral sites. The existence of the minimum in ΔH is due to a compensation point in the magnetocrystalline anisotropy.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 7 , July 2002 , pp. 1702 - 1705
Copyright
Copyright © Materials Research Society 2002

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