Article: Sr ferrite-MQP hybrid bonded magnets Journal: International Journal of Materials and Product Technology (IJMPT) 2006 Vol.27 No.1/2 pp.71 - 79 Abstract: A magnetic interaction and magnetisation reversal study at room temperature in hybrid magnets of strontium ferrite and Magnequench MQP-Q alloy were carried out. The evolution of the DCD reversible (Mrev) and irreversible (Mirr) magnetisation components during the magnetisation and the demagnetisation processes was determined. Mrev(Mirr)Hi curves were built, being Hi the internal field of the sample. The experimental behaviour of the Mrev(Mirr)Hi curves suggests the existence of a complex non-uniform mechanism for the magnetisation reversal in these materials. Henkel plots showed a notable predominance of the demagnetising-like magnetostatic interactions. Moving Preisach parameter km was determined. km is found to be a function of Hi. The behaviour of this function is discussed. Inderscience Publishers - linking academia, business and industry through research

Title: Sr ferrite-MQP hybrid bonded magnets

Authors: D. Bueno-Baques, D.R. Cornejo, E. Padron-Hernandez, P. Sifuentes Gallardo, O. Rodriguez Fernandez, J.A. Matutes-Aquino

Addresses: Centro de Investigacion en Materiales Avanzados, S.C. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, Chih. 31109, Mexico. ' Departamento de Fisica, Universidade Federal de Pernambuco, 50670 901, Recife, PE, Brazil. ' Departamento de Fisica, Universidade Federal de Pernambuco, 50670 901, Recife, PE, Brazil. ' Centro de Investigacion en Quimica Aplicada, Blvd. Enrique Reyna Hermosillo 140, Apto, Postal 379, Saltillo, Coah, 25100, Mexico. ' Centro de Investigacion en Quimica Aplicada, Blvd. Enrique Reyna Hermosillo 140, Apto, Postal 379, Saltillo, Coah, 25100, Mexico. ' Centro de Investigacion en Materiales Avanzados, S.C. Miguel de Cervantes 120, Complejo Industrial Chihuahua, Chihuahua, Chih. 31109, Mexico

Abstract: A magnetic interaction and magnetisation reversal study at room temperature in hybrid magnets of strontium ferrite and Magnequench MQP-Q alloy were carried out. The evolution of the DCD reversible (M_rev) and irreversible (M_irr) magnetisation components during the magnetisation and the demagnetisation processes was determined. M_rev(M_irr)_Hi curves were built, being Hi the internal field of the sample. The experimental behaviour of the M_rev(M_irr)_Hi curves suggests the existence of a complex non-uniform mechanism for the magnetisation reversal in these materials. Henkel plots showed a notable predominance of the demagnetising-like magnetostatic interactions. Moving Preisach parameter k_m was determined. k_m is found to be a function of Hi. The behaviour of this function is discussed.

Keywords: hybrid magnets; bonded magnets; magnetic interactions; Henkel plots; magnetisation reversal; demagnetisation.

DOI: 10.1504/IJMPT.2006.010671

International Journal of Materials and Product Technology, 2006 Vol.27 No.1/2, pp.71 - 79

Published online: 16 Aug 2006 *

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Title: Sr ferrite-MQP hybrid bonded magnets

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