Premium
Localized Modes Due to Impurity Pairs in a Heisenberg Ferromagnet
Author(s) -
Tucker J. W.,
Walls J.
Publication year - 1973
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.2220560122
Subject(s) - impurity , ferromagnetism , condensed matter physics , symmetry (geometry) , physics , heisenberg model , mode (computer interface) , simple (philosophy) , quantum mechanics , mathematics , philosophy , geometry , epistemology , computer science , operating system
The energy of localized modes due to a nearest‐neighbour pair defect in a simple cubic Heisenberg ferromagnet is investigated. Particular attention is paid to the p‐symmetry mode oriented along the direction of the inter‐impurity bond since for this mode the energy depends on the impurity‐impurity exchange constant. It is found that the results of a two‐parameter variational calculation, along the lines suggested by Tucker and Kilby, are in very good agreement with those of an exact treatment.