Weizhong Tangand H Zabel, Correlation between Thermal Expansion and Magnetic Characteristics of Fe-Ni Alloys in Fe1-xNix/Cu Superlattices, J. Univ. Sci. Technol. Beijing, 5(1998), No. 3, pp. 169-174.
Cite this article as:
Weizhong Tangand H Zabel, Correlation between Thermal Expansion and Magnetic Characteristics of Fe-Ni Alloys in Fe1-xNix/Cu Superlattices, J. Univ. Sci. Technol. Beijing, 5(1998), No. 3, pp. 169-174.
Weizhong Tangand H Zabel, Correlation between Thermal Expansion and Magnetic Characteristics of Fe-Ni Alloys in Fe1-xNix/Cu Superlattices, J. Univ. Sci. Technol. Beijing, 5(1998), No. 3, pp. 169-174.
Citation:
Weizhong Tangand H Zabel, Correlation between Thermal Expansion and Magnetic Characteristics of Fe-Ni Alloys in Fe1-xNix/Cu Superlattices, J. Univ. Sci. Technol. Beijing, 5(1998), No. 3, pp. 169-174.
Matrial Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China
Institute of Experimental Physics/Solid State Physics, Ruhr University Bochum, 44780 Bochum, Germany
中文摘要
Thermal expansion behaviors of FeNi alloys were investigated by means of X-ray diffraction technique within a Fe1-xNix/Cu superiattice structure. It was found that with a Ni concentration of x = 0.35, FeNi alloy layers showed the well-known Invar behavior, but for alloy layers with either lower or higher Ni concentrations, thermal expansion coefficients were larger. Based on results of magnetic measurements it is concluded that FeNi alloy layers with Ni concentrations lower than the Invar composition are in a superparamagnetic state which leads not only to low spontaneous magnetizations but also to large thermal expansions of the alloy layers.
Thermal expansion behaviors of FeNi alloys were investigated by means of X-ray diffraction technique within a Fe1-xNix/Cu superiattice structure. It was found that with a Ni concentration of x = 0.35, FeNi alloy layers showed the well-known Invar behavior, but for alloy layers with either lower or higher Ni concentrations, thermal expansion coefficients were larger. Based on results of magnetic measurements it is concluded that FeNi alloy layers with Ni concentrations lower than the Invar composition are in a superparamagnetic state which leads not only to low spontaneous magnetizations but also to large thermal expansions of the alloy layers.
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