Equilibrium and nonequilibrium magnetic behaviour of a reentrant Ising spin glass

doi:10.1016/0304-8853(92)91475-9

Journal of Magnetism and Magnetic Materials

Volumes 104–107, Part 3, 2 February 1992, Pages 1607-1608

https://doi.org/10.1016/0304-8853(92)91475-9 Get rights and content

Abstract

The reentrant Ising spin glass Fe_0.62Mn_0.38TiO₃ has been investigated using SQUID magnetometry. The system is antiferromagnetic below T_N(H = 0) = 33 K, and enters a mixed antiferromagnetic/spin glass phase below T_g(H = 0) = 25.8 K. Within the concept of a recent mean field model, a ratio T_N(0)/T_g(0) close to unity indicates both intra- and interlayer frustration. The existence of an overlap length, l_ΔT, below which equilibrium spin correlations at temperatures T and T + ΔT are indistinguishable has been verified by magnetic relaxation experiments on this spin glass system.

References (7)

P. Wong et al.
Phys. Rev. Lett.
(1985)
H. Yoshizawa et al.
J. Phys. Soc. Jpn.
(1988)
K. Gunnarsson et al.
Phys. Rev. Lett.
(1988)
K. Gunnarsson et al.
Phys. Rev. B
(1991)

There are more references available in the full text version of this article.

Cited by (2)

On the frequency dependence of the ferro-to-spin-glass transition of amorphous Fe-rich Fe-Zr
1994, Journal of Magnetism and Magnetic Materials
Low temperature ac-susceptibility measurements have been carried out over 5 decades of ac-field (0.08–8000 A/m) and 3 decades of frequency (1–1000 Hz) on amorphous ribbons of Fe₉₀Zr₁₀. We find that below a threshold field (24 A/m) the susceptibility at low temperatures is independent of the exciting ac-field amplitude. Thus the peak in the viscous susceptibility, χ″(T), found at low temperatures and low fields is used as an unambiguous definition of the freezing temperature, T_sf. The frequency dependence of the susceptibility at low temperatures has been found to be very weak for low fields but rather strong at high fields — a behaviour which should be attributed to the influence of the field dependence of the coexisting Hopkins peak effect. From power law scaling, $τ/τ_{0} = (1 − T^{∗} /T_{sf})^{-vZ}$ , analyses of the frequency dependence at low fields we obtain exponents vZ = 8 ± 1 and microscopic relaxation time τ₀ ≈ 2 × 10^-10 s. These observations suggest that only the peaks in χ″(T) for the low field regime are related to the reentrant state with a critical spin freezing temperature $T^{∗} = 20 ± 3 K$ .
The reentrant Ising spin-glass Fe<inf>0.62</inf>Mn<inf>0.38</inf>TiO<inf>3</inf> studied with the Mössbauer technique
1992, Journal of Magnetism and Magnetic Materials
The reentrant Ising spin-glass Fe_0.62Mn_0.38TiO₃ has been studied with Mössbauer spectroscopy and SQUID magnetometry. Below the spin-glass freezing temperature of 26.6 K a majority of the iron magnetic moments are canted with respect to the crystallographic c axis. The average canting angle is as large as 〈φ〉 = 41°. There is no abrupt change in 〈φ〉 at the reentrant transition. The probability of the iron magnetic moments to be aligned in the c direction is lower in the spin-glass range than in the antiferromagnetic range. Transversal spin-glass behaviour is observed.

View full text

Equilibrium and nonequilibrium magnetic behaviour of a reentrant Ising spin glass

Abstract

Phys. Rev. Lett.

J. Phys. Soc. Jpn.

Phys. Rev. Lett.

Phys. Rev. B