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Spin waves in the uniaxial spin glass system Fe1−xMgxCl2 (1987)

Wong, Po-zen ; Yoshizawa, H. ; Shapiro, S. M.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 61 (1987), S. 4077-4079

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: We report an inelastic neutron scattering study of the uniaxial dilute antiferromagnets Fe1−xMgxCl2, for x=0.3, 0.45, and 0.6. The first two samples have long-range antiferromagnetic (AF) order. Their spin-wave peaks are broadened by the exchange fluctuations. The x=0.6 sample orders like an Ising spin glass with a very short AF correlation length (ξ≈10 A(ring)). For wavelength λ(approximately-less-than)ξ, spin wave peaks are similar to the dilute antiferromagnets, but for λ(approximately-greater-than)2ξ, the peak sharpens up and becomes resolution limited at the zone center. We give a simple explanation for this behavior.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.338533

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