Grain boundary contribution to recoil loop openness of exchange-coupled nanocrystalline magnets | Zendy

Chuanbing Rong | Zendy; J. Ping Liu | Zendy

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Grain boundary contribution to recoil loop openness of exchange-coupled nanocrystalline magnets

Author(s) -

Chuanbing Rong,

J. Ping Liu

Publication year - 2009

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3127226

Subject(s) - recoil , nanocrystalline material , materials science , magnet , condensed matter physics , grain boundary , magnetization , micromagnetics , phase (matter) , phase boundary , physics , magnetic field , metallurgy , nanotechnology , nuclear physics , microstructure , quantum mechanics

It has been well known that recoil loop openness is related to soft-phase presence in exchange-coupled hard-soft nanocomposite magnets. Our study on recoil loop openness of exchange-coupled nanocrystalline magnets (both single-phase and composite) using a micromagnetic finite-element method has revealed that the recoil loop openness is also due to decreased grain size. Open recoil loops exist in single-phase magnets as well. Simulation of magnetization distribution in both nanocrystalline single-phase magnets and nanocomposite magnets shows that the openness of the recoil loops is correlated with unstable magnetization behavior in grain boundary and soft-phase regions, which is attributed to high energy state caused by exchange coupling in these regions. The simulation results are supported by experimental data.

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