Coercive Field and Domain Wall Properties in <math>(Dyx Y1-x) Fe2</math> and <math>ErxY1-xFe2</math> Intermetallic

Nota de FísicaPublicado

Coercive Field and Domain Wall Properties in $<math>(Dy_{x} Y_{1-x}) Fe_2</math>$ and $<math>Er_{x}Y_{1-x}Fe_2</math>$ Intermetallic

K.M.B. Alves; Luiz C. Sampaio; A. P. Guimarães; S.F. da Cunha

1997

Autores: K.M.B. Alves; Luiz C. Sampaio; A. P. Guimarães; S.F. da Cunha
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1997
Descrição: Isothermal DC magnetization measurements were performed in <math>(R_{x}, Y_{1-x})Fe_2\,\!</math> <math>(with R = Dy\,\!</math> and <math>Er\,\!</math>, in the range of <math>0 < x < 1\,\!</math>, for several temperatures. The observed pronounced decay of the coercive field <math>H_c\,\!</math> with temperature was fitted with an exponential. The coercive field <math>H_c\,\!</math>, and the propagation field <math>H_p\,\!</math> show a maximum value in the range of <math>30-40%\,\!</math> concentration for Dy or Er. At low temperatures, the coercive field <math>H_c\,\!</math> decreases exponentially with temperature, near <math>50% R\,\!</math> concentration. These results can be explained by intrisinc domain wall pinning. Time relaxations of the remanent magnetization are measured and attributed to domain wall surface deformations.
Ano: 1997
Número: CBPF-NF-020/93
Vínculo com tese: Não
Vínculo com bolsa: Não