Effect of the Next‐Nearest Neighbour Coupling in a Semi‐Infinite Ferrimagnet | Zendy

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Effect of the Next‐Nearest Neighbour Coupling in a Semi‐Infinite Ferrimagnet

Author(s) -

DiepTheHung

Publication year - 1977

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.2220820144

Subject(s) - ferrimagnetism , surface (topology) , condensed matter physics , spin (aerodynamics) , coupling (piping) , nearest neighbour , k nearest neighbors algorithm , spin wave , mode (computer interface) , physics , materials science , quantum mechanics , mathematics , geometry , ferromagnetism , computer science , magnetization , artificial intelligence , magnetic field , metallurgy , thermodynamics , operating system

The surface spin‐wave energy in a semi‐infinite Heisenberg ferrimagnet is calculated. The study is based on a body‐centered‐cubic structure with a (100) surface as the outermost layer and where the exchange interactions between nearest‐neighbours, J 1 and between next‐nearest neighbours, J 2 , are taken into account. The conditions under which the uniform spin configuration becomes unstable are derived by considering a surface “soft” mode. Surface spin rearrangement is also discussed.

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