MOSSBAUER-SPECTRA OF FERRIHYDRITE - SUPERFERROMAGNETIC INTERACTIONS AND ANISOTROPY LOCAL ENERGY

被引：17

作者：

CIANCHI, L ^{[1
]}

MANCINI, M ^{[1
]}

SPINA, G ^{[1
]}

TANG, H ^{[1
]}

机构：

[1] UNIV FLORENCE,DIPARTMENTO FIS,I-50139 FLORENCE,ITALY

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 08期

关键词：

D O I：

10.1088/0953-8984/4/8/020

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The Mossbauer spectra of a sample of synthetic ferrihydrite have been investigated in the 26-220 K temperature range in order to identify the mechanism giving rise to the relaxation times. The results show that the temperature dependence of the relaxation times is in accordance with the Vogel-Fulcher law. This indicates that the magnetic interaction between the crystallites is significant. From the temperature dependence of the mean magnetic field under T(B) we also argue for a strong correlation between the spatial orientations of neighbouring clusters.

引用

页码：2073 / 2077

页数：5

共 14 条

[1]

BALDINI A, 1992, IN PRESS NUCL INST B

[2] A MOSSBAUER STUDY OF MAGNETIC-RELAXATION AND THE MORIN TRANSITION IN AMORPHOUS AND CRYSTALLINE IRON-OXIDE SYSTEMS [J].