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- W2095358001 abstract "ɛ-Fe3−xNixN (0.1 ≤ x ≤ 0.8) nanoparticles are investigated for the magnetic interaction effects at low temperatures. The reduction of saturation magnetization (σs) values is attributed to spin pairing effects and surface spin canting. In ZFC and FC magnetization curves, the surface spin-glass layer (Tf1) and the reentrant spin-glass behavior (Tf2) are evidenced below 27 and 22 K respectively. The surface spin-glass phase is described by the random-field model of exchange anisotropy. Based on this theory, a surface spin-glass layer about 8 nm thick is determined. The reentrant spin-glass behavior occurs due to the disorder created by Ni substitution and is observed for 0.2 ≤ x ≤ 0.4. The spin-glass-like ordering in the representative ɛ-Fe2.6Ni0.4N system is verified using spin relaxation dynamics and ac susceptibility measurements. The dynamic scaling analysis, based on imaginary part of the ac susceptibility data, gives the parameters τ0 = 10−8 s, Tc = 15.3 K, and zν = 4.5 and hence confirm the spin-glass-like ordering in ɛ-Fe3−xNixN (0.1 ≤ x ≤ 0.8) nanoparticles." @default.
- W2095358001 created "2016-06-24" @default.
- W2095358001 creator A5077416470 @default.
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- W2095358001 date "2008-04-01" @default.
- W2095358001 modified "2023-09-26" @default.
- W2095358001 title "Spin-glass-like ordering in ɛ-Fe3−xNixN (0.1≤x≤0.8) nanoparticles" @default.
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- W2095358001 doi "https://doi.org/10.1016/j.matchemphys.2007.09.016" @default.
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