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- W2000725695 abstract "We present analytic expressions for the temperature dependent magnetization and magnon dispersion relation of the antiferromagnetic (AFM) EuTe . This bulk semiconductor represent a concentrated spin system for which the interaction between magnons has to be taken into account. We do this using the renormalized spin wave theory. A higher order Green's function according to Tjablikov is used for their description. As a result, we obtain a modified Bloch-T 3/2 law, for low temperatures and high magnetic fields. A full analytic expression is given for the sublattice magnetization of the AFM EuTe (B 0 = 0), with a Néel temperature of T N = 9.81 K. In the case of EuTe , the magnon excitation energies exhibit a characteristic maximum. For q = 0, an energy gap E g occurs in the spin wave spectrum, a consequence of the AFM exchange interaction J 2 (T). Such energy gaps exist in the spectrum of magnon excitation energies only in systems with AFM interactions." @default.
- W2000725695 created "2016-06-24" @default.
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- W2000725695 date "2011-09-20" @default.
- W2000725695 modified "2023-09-28" @default.
- W2000725695 title "MAGNETIZATION AND MAGNON EXCITATION ENERGIES OF THE MAGNETIC SEMICONDUCTOR EuTe" @default.
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- W2000725695 doi "https://doi.org/10.1142/s0217984911027170" @default.
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