| 1. |
|
|
| 2. |
|
|
| 3. |
- Ginnarsson, K., et al.
(författare)
-
Equilibrium and nonequilibrium magnetic behaviour of a reentrant Ising spin glass.
- 1992
-
Ingår i: Journal of Magnetism and Magnetic Materials. - : Elsevier BV. - 0304-8853 .- 1873-4766. ; 104-107:3, s. 1607-1608
-
Tidskriftsartikel (refereegranskat)abstract
- The reentrant Ising spin glass Fe0.62Mn0.38TiO3 has been investigated using SQUID magnetometry. The system is antiferromagnetic below TN(H = 0) = 33 K, and enters a mixed antiferromagnetic/spin glass phase below Tg(H = 0) = 25.8 K. Within the concept of a recent mean field model, a ratio TN(0)/Tg(0) close to unity indicates both intra- and interlayer frustration. The existence of an overlap length, lΔT, 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
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
- GUNNARSSON, K, et al.
(författare)
-
STATIC SCALING IN A SHORT-RANGE ISING SPIN-GLASS
- 1991
-
Ingår i: Physical Review B Condensed Matter. - 0163-1829 .- 1095-3795. ; 43, s. 8199-8203
-
Tidskriftsartikel (refereegranskat)abstract
- The nonlinear ac susceptibility chi’-nl of the short-range Ising spin glass Fe0.5Mn0.5TiO3 has been measured using a superconducting-quantum-interference-device magnetometer. The spin-glass temperature, T(g), and the critical exponent gamma were estimated from the temperature dependence of the quadratic field term of chi’nl, yielding T(g) = 20.70 and gamma = 4.0. Static-scaling analyses, using different scaling equations, gave similar results. Using gamma and results from previous dynamic-scaling analyses, a number of critical exponents have been obtained through different scaling relations, e.g., delta = 8.4 and nu = 1.7. The results support the existence of a finite-temperature phase transition in a three-dimensional Ising spin glass.
|
|
| 7. |
|
|
