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Low‐temperature properties of a magnetic nanowire
Author(s) -
Xianyu Zhengnan,
Du An
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201600601
Subject(s) - condensed matter physics , spins , antiferromagnetism , physics , heisenberg model , spin (aerodynamics) , spin wave , ferromagnetism , magnetization , quantum , quantum fluctuation , quantum mechanics , magnetic field , thermodynamics
The cylindrical core–shell nanowire with an antiferromagnetic core and a ferromagnetic core described by the quantum Heisenberg spin model are studied by using linear spin‐wave theory and Green's function method. Considering the different symmetry of spins, we introduce two different Fourier transforms to spin‐deviate operators. We give the spectrum of the system, analyze the quantum fluctuations of spins at zero temperature, and discuss the low‐temperature behavior of the sublattice magnetization, internal energy and specific heat. It is found that the type of exchange interactions and spin special structure affect the magnetic properties of system very much, changing the magnetic structure of the system making the quantum fluctuation different, but cannot affect the thermal fluctuation dramatically.