Pavkov, M; Škrinjar, M; Kapor, D; Stojanović, S - In: Physica A: Statistical Mechanics and its Applications 280 (2000) 3, pp. 465-483
Properties of semi-infinite (S=1) Heisenberg ferromagnet with biquadratic exchange were studied in terms of surface exchange (ε=IS/I) and biquadratic coupling (a). It was shown that a strict correlation exists, depending on ε, between the type of surface spin waves (acoustic or optical) and...
