Intrinsic Domain wall Pinning in <math> Hf(Fe0.5Al0.5)2</math>

Nota de FísicaPublicado

Intrinsic Domain wall Pinning in $<math> Hf(Fe_{0.5}Al_{0.5})_2</math>$

Luiz C. Sampaio; S.F. da Cunha

1990

Autores: Luiz C. Sampaio; S.F. da Cunha
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1990
Descrição: The magnetization vs. temperature curve for <math>\; Hf(Fe_{0.5}Al_{0.5})_2</math> in low applied field presents a maximum and also an irreversibility up to near the Curie temperature. For temperatures lower than <math>7\,\!</math> <math>K\,\!</math> approximately, a critical field (propagation field) exist in the virgin magnetization curves. Even in high fields <math>(70\,\!</math> <math> kOe)\,\!</math> the magnetization values are not saturated, suggesting high anisotropy energy and consequently narrow domain walls. An exponential temperature decrease of the coercive field is observed. These phenomena can be explained by intrinsic domain wall pinning. The time effect in the demagnetization region of the hysteresis loop was measured and it is related to the wall deformation (kink creation). A brief comparison with other systems is done.
Ano: 1990
Número: CBPF-NF-007/90
Vínculo com tese: Não
Vínculo com bolsa: Não