The magnetic anisotropy of LaCo-hexaferrites has been investigated by the use of the singular point detection and the second harmonic techniques in the low-temperature range. Below Full-size image (<1 K) a steep rise of the anisotropy field has been observed together with a strong distortion of the magnetization curve which is interpreted as due to a negative K2 and a large positive K3 anisotropy constants. The results are analyzed in terms of an extended Stoner–Wohlfarth model and the obtained values of the anisotropy coefficients χ2,0,χ4,0,χ6,0 are reported versus temperature.
Magnetic anisotropy of LaCo-substituted SrFe12O19 ferrites / Asti, Giovanni; F., Bolzoni; J. M., LE BRETON; Ghidini, Massimo; A., Morel; Solzi, Massimo; F., Kools; P., Tenaud. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 272-276:(2004), pp. E1845-E1846. [10.1016/j.jmmm.2003.12.1275]
Magnetic anisotropy of LaCo-substituted SrFe12O19 ferrites
ASTI, Giovanni;GHIDINI, Massimo;SOLZI, Massimo;
2004-01-01
Abstract
The magnetic anisotropy of LaCo-hexaferrites has been investigated by the use of the singular point detection and the second harmonic techniques in the low-temperature range. Below Full-size image (<1 K) a steep rise of the anisotropy field has been observed together with a strong distortion of the magnetization curve which is interpreted as due to a negative K2 and a large positive K3 anisotropy constants. The results are analyzed in terms of an extended Stoner–Wohlfarth model and the obtained values of the anisotropy coefficients χ2,0,χ4,0,χ6,0 are reported versus temperature.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
