IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
METAMAGNETISM IN FRUSTRATED SPIN CHAINS
Autor/es:
MARCELO ARLEGO; FABIAN HEIDRICH-MEISNER; ANDREAS HONECKER; GERARDO ROSSINI; TEIMURAZ VEKUA
Lugar:
Natal
Reunión:
Workshop; Geometrically Frustrated Magnets: from spin ice to kagome planes; 2011
Institución organizadora:
International Institute of Physics
Resumen:
We show that frustrated, SU(2)-symmetric spin-S chains with ferromagnetic nearest-neighbor interactions exhibit metamagnetic behavior under the influence of an external magnetic field for small S, in the form of a first-order transition to the fully polarized state. The magnetization jump increases gradually starting from an S-dependent critical value of exchange couplings and takes a maximum in the vicinity of a Lifshitz point. The metamagnetism results from resonances in the dilute magnon gas caused by an interplay between quantum fluctuations and frustration.
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