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X‐ray absorption edge shifts of cobalt and rare earth ions in rare earth–cobalt intermetallic compounds
Author(s) -
Hatwar T. K.,
Malik S. K.,
Ghatikar M. N.,
Padalia B. D.
Publication year - 1979
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220950235
Subject(s) - intermetallic , cobalt , absorption (acoustics) , ion , materials science , rare earth , absorption edge , atom (system on chip) , chemistry , crystallography , inorganic chemistry , metallurgy , organic chemistry , composite material , optoelectronics , alloy , band gap , computer science , embedded system
Chemical shifts Δ E of K‐absorption edge of Co and L 3 ‐absorption edge of Gd, Tb, and Dy in GdCo 3 , TbCo 3 , and DyCo 3 intermetallic compounds are measured and effective charges on the absorbing ions are estimated. It is found that the magnitudes of Δ E and q for Co in RCo 3 (R refers to rare earth ions) lie in between those reported for RCo 5 and RCo 2 compounds. Further, Δ E and q of Co increase with increasing number of rare earth atoms per cobalt atom (RCo 5 < RCo 3 < RCo 2 ) while the magnetic moment of cobalt in these intermetallic compounds indicates the opposite trend (RCo 5 > RCo 3 > RCo 2 ).