Magnetic properties of undoped and Co-doped n-type β–FeSi2.5 single crystals

被引：0
作者：
E. Arushanov
L. Ivanenko
D. Eckert
G. Behr
U. K. Rößler
K-H. Müller
C. Schneider
J. Schumann
机构：
[1] Institute of Solid State and Materials Research Dresden,Institute of Applied Physics
[2] Academy of Sciences of Moldova,undefined
[3] Belarusian State University of Informatics and Radioelectronics,undefined
来源：
Journal of Materials Research | 2002年 / 17卷
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摘要：
Results of magnetization and magnetic susceptibility measurements on undoped and Co-doped FeSi2.5 single crystals are presented. The temperature dependence of the magnetic susceptibility of the Co-doped sample in the range of 5–300 K can be explained by temperature-dependent contributions due to paramagnetic centers and the carriers excited thermally in the extrinsic conductivity region. The values of the paramagnetic Curie temperature and activation energy of the donor levels were estimated. It is also shown that the magnetic susceptibility of Co-doped samples cooled in zero external field and in a field are different. This resembles the properties of spin-glasses and indicates the presence of coupling between magnetic centers.
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页码：2960 / 2965
页数：5
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