Phenomenological Theory of Multiple Spin Density Waves in fcc Transition Metals(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
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概要
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The relative stability among the multiple spin density wave (MSDW) states in fcc transition metals has been investigated on the basis of a Ginzburg-Landau type of free energy with terms up to the fourth order in magnetic moments. Obtained magnetic phase diagrams in the space of expansion coefficients indicate the possibility of various 3Q MSDW states in fcc transition metals: the commensurate 3Q state with Q=2π/a (a being the lattice constant), the incommensurate linearly polarized 3Q state, and the incommensurate helically polarized 3Q state. It is shown that these 3Q states are always stabilized, when they are compared with the corresponding 2Q and 1Q states, and their magnetic moment amplitudes are the largest among those of the three states. The results are compared with previous results of the groundstate calculations, and possible scenarios to explain the experimental data of cubic ν-Fe are proposed.
- 社団法人日本物理学会の論文
- 2006-09-15
著者
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KAKEHASHI Yoshiro
Department of Physics and Earth Sciences, Faculty of Science, University of the Ryukyus
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Uchida Takashi
Hokkaido Institute Of Technology
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Kakehashi Yoshiro
Univ. Ryukyus Okinawa
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Kakehashi Yoshiro
Department Of Physics And Earth Sciences Faculty Of Science University Of Ryukyus
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