Premium
Dipole–Dipole Interaction and Short‐Range Order in Amorphous NiP, NiCuP, and NiPB Alloys
Author(s) -
Bakonyi I.,
Takács L.,
Tompa K.
Publication year - 1981
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.2221030205
Subject(s) - amorphous solid , dipole , amorphous metal , laser linewidth , moment (physics) , order (exchange) , spins , materials science , condensed matter physics , atomic physics , nuclear magnetic resonance , analytical chemistry (journal) , physics , chemistry , crystallography , optics , quantum mechanics , laser , finance , chromatography , economics
The field‐independent 31 P NMR linewidth, δ H o , is measured in nonmagnetic amorphous Ni‐based alloys. In addition, the second moment contribution M D 2originating from direct nuclear dipole–dipole interaction is calculated using Van Vleck's theory based on a computer generated DRPHS amorphous model cluster. The calculated second moment M D 2and the experimental second moment M G 2obtained from δ H o by Gaussian line shape approximation (i.e., M G 2= (δ H o ) 2 /4) agree fairly well for a (Ni 0.27 Cu 0.73 ) 82 P 18 metallic glass. In the case of amorphous NiP and NiPB alloys M G 2exceeds M D 2by a factor of two or three. This excess second moment seems to indicate the presence of some indirect indirect interactions between nuclear spins.