Magnetic properties of the clinopyroxenes aegirine and hedenbergite: a magnetic susceptibility study on single crystals

被引：0

作者：

E. Baum

W. Treutmann

W. Lottermoser

G. Amthauer

机构：

[1] Institut für Mineralogie,

[2] Petrologie und Kristallographie,undefined

[3] Universität Marburg,undefined

[4] Hans-Meerwein-Straße,undefined

[5] D-35032 Marburg,undefined

[6] Germany,undefined

[7] Institut für Mineralogie,undefined

[8] Universität Salzburg,undefined

[9] Hellbrunner Straße 34,undefined

[10] A-5020 Salzburg,undefined

[11] Austria,undefined

来源：

Physics and Chemistry of Minerals | 1997年 / 24卷

关键词：

Magnetic Property; Magnetic Susceptibility; Powdered Sample; Electron Microprobe; Magnetic Transition;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Two natural clinopyroxene single crystals were investigated, an aegirine-augite (AEG) and a magnesian hedenbergite (HED). Both samples were carefully characterized by electron microprobe, X-ray diffraction, and Mössbauer spectroscopy. Magnetic susceptibility measurements of powdered samples reveal low temperature antiferromagnetic coupling and Curie-Weiss behaviour with TN=7.5(5) K, ΘP=−19(1) K for AEG, and TN=31(1) K, ΘP=+21(1) K for HED, respectively. Low temperature Mössbauer spectra exhibit relaxation phenomena. Magnetic susceptibility measurements of the single crystals show the direction of the magnetic moments to be lying within the a/c plane for both samples: 50(±2)° from a and 57(±2)° from c in AEG, and 45(±2)° from a and 60(±2)° from c in HED, respectively. The antiferromagnetic interchain interaction competes with the ferromagnetic intrachain interaction in both pyroxenes. In the magnesian hedenbergite a field induced magnetic transition is found. Its dependence on temperature, magnetic field and crystallographic direction is investigated and described.

引用

页码：294 / 300

页数：6