Spin-wave theory of double-exchange magnets
نویسندگان
چکیده
منابع مشابه
Spin-wave Hamiltonian in double-exchange systems
A simple derivation of the effective spin-wave Hamiltonian for a double-exchange system with infinitely large Hund’s-rule coupling is demonstrated. The formalism can be applied to models with arbitrary range of hopping as well as those with randomness. The result shows that, within the leading order of the 1/S expansion, one magnon excitation spectrum can be described by the Heisenberg model.
متن کاملSpin-wave theory of exchange-induced anisotropy
It is shown that exchange interactions of spins across the boundary between ferromagnetic and antiferromagnetic layers can cause a shift in the observed hysteresis loop of the ferromagnetic layer. The effect may be interpreted as a self-energy shift of each ferromagnetic spin due to emission and reabsorption of virtual antiferromagnetic spin waves. Emission of these waves by one ferromagnetic s...
متن کاملSpin-wave localization in disordered magnets
The propagation of spin waves [1] is in the focus of modern research because of its importance for spin caloritronic applications [2–6], and for future information processing devices which might either rely on magnonic [7] instead of electronic transport or combine electronic with magnonic transport. The dynamics of spin waves is mostly described by the Landau-Lifshitz-Gilbert equation, a nonli...
متن کاملJa n 19 99 On the self - consistent spin - wave theory of layered Heisenberg magnets
The versions of the self-consistent spin-wave theories (SSWT) of two-dimensional (2D) Heisenberg ferro-and antiferromagnets with a weak inter-layer coupling and/or magnetic anisotropy, that are based on the non-linear Dyson-Maleev, Schwinger, and combined boson-pseudofermion representations , are analyzed. Analytical results for the temperature dependences of (sublattice) magnetization and shor...
متن کاملOverhauser’s spin-density wave in exact-exchange spin density functional theory
S. Kurth 2, 3 and F. G. Eich 5, 3 Nano-Bio Spectroscopy Group, Dpto. de F́ısica de Materiales, Universidad del Páıs Vasco UPV/EHU, Centro F́ısica de Materiales CSIC-UPV/EHU, Av. Tolosa 72, E-20018 San Sebastián, Spain IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain European Theoretical Spectroscopy Facility (ETSF) Institut für Theoretische Physik, Freie Universität Berlin, Arnima...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2000
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.372528