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Structure and Properties of GdAuSn and the GdAuSn/MnAuSn System
Author(s) -
Casper Frederick,
Ksenofontov Vadim,
Kandpal Hem Chandra,
Reiman Sergey,
Shishido Toetsu,
Takahashi Masashi,
Takeda Masuo,
Felser Claudia
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200500523
Subject(s) - antiferromagnetism , condensed matter physics , ferromagnetism , materials science , hyperfine structure , electronic band structure , crystal structure , magnetoresistance , mössbauer spectroscopy , magnetic structure , crystallography , magnetization , chemistry , physics , magnetic field , atomic physics , quantum mechanics
The crystal structure of GdAuSn was refined by means of single crystal X‐ray diffraction. Band structure calculations based on the structural data confirmed the antiferromagnetic ground state and the metallic behaviour of GdAuSn. 119m Sn, 155 Gd and 197 Au Mössbauer spectroscopic studies were used to verify the values of the hyperfine parameters that were given by the band structure calculations. Band structure calculations of MnAuSn confirmed that this half‐Heusler compound belongs to the family of half‐metallic ferromagnets. Magnetic susceptibility, conductivity and Mössbauer studies were used to characterize granular material based on the half‐Heusler ferromagnet MnAuSn in the antiferromagnetic GdAuSn matrix. Magnetoresistance measurements of the granular systems revealed an enormously high positive effect at temperatures below the antiferromagnetic ordering in GdAuSn.