Open AccessSTRUCTURAL AND MAGNETIC PROPERTIES OF [Pd/Co-Nb/Pd/Si] MULTILAYERED FILMS
Author(s) -
Suying Yan,
Yihua Liu,
Chen Jing-Geng,
Mei Liang-Mo,
Jie Huang
Publication year - 1996
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.45.533
Subject(s) - materials science , crystallite , amorphous solid , lattice constant , alloy , magnetization , condensed matter physics , monolayer , magnetism , sputtering , diffraction , thin film , crystallography , nanotechnology , composite material , optics , magnetic field , metallurgy , chemistry , physics , quantum mechanics
Two series of [Pd/Co-Nb/Pd/Si] multilayer films were prepared by rf sputtering. The measurements of structure and magnetism were made by X-ray diffraction and magnetometer, respectively. As the thickness of Pd layers increases, the structure of Pd layers transfers from an amorphous state to a polycrystalline state. The polycrystalline state of the Pd layers shows two adjacent Pd fcc(111) peaks, which originate from the differences of lattice-mismatching degree and polarization of Pd atoms between the interfaces of Co-Nb layers and Pd layers and the interfaces of Pd layers and Si layers. As the thickness of Pd layers increases, the saturation magnetization monotonously increases from a value which is smaller than that of the bulk Co-Nb alloy with the same compositions to another value which is larger, then takes a constant value. This is contributed to the effects of polarization of Pd layers, dimension of Co-Nb magnetic layers and interdiffusion of atoms in the interfaces. The amorphous Co-Nb layers can influence the polarization of Pd atoms in the range of 2.5nm from the interfaces of Co-Nb layers and Pd layers. The is related to the strong interdiffusion of atoms in the interfaces and the large change of the Pd lattice constant in the film normal.