[Formula presented]: A Frustrated Ferromagnet

G. Zaránd, Boldizsár Jankó

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Abstract

Starting from a microscopic description of the exchange interaction in [Formula presented], we derive an effective Mn-Mn interaction. Because of the strong spin-orbit coupling in the valence band, this effective interaction is highly anisotropic and has a spatial structure somewhat similar to dipolar interactions. The corresponding ground state has a finite magnetization but is intrinsically spin disordered even at zero temperature, explaining many features of the experimental data. Our results are relevant for many magnetic semiconductors.

Original languageEnglish
JournalPhysical Review Letters
Volume89
Issue number4
DOIs
Publication statusPublished - Jan 1 2002

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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