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pro vyhledávání: '"Jonason, K."'
The diluted Ising antiferromagnet, Fe_{0.31}Zn_{0.69}F_{2}, has been investigated by dynamic susceptibility measurements in zero and and finite applied dc-fields. In zero field, there is a para- to antiferromagnetic phase transition at $T_{N} \approx
Externí odkaz:
http://arxiv.org/abs/cond-mat/9905384
Publikováno v:
Eur. Phys. J. B 13, 99 (2000)
When a spin glass is cooled down, a memory of the cooling process is imprinted in the spin structure. This memory can be disclosed in a continuous heating measurement of the ac-susceptibility. E.g., if a continuous cooling process is intermittently h
Externí odkaz:
http://arxiv.org/abs/cond-mat/9904410
Autor:
Jonason, K., Nordblad, P.
Experiments on the time dependence of the response function of a Ag(11 at%Mn) spin glass at a temperature below the zero field spin glass temperature are used to explore the non-equilibrium nature of the spin glass phase. It is found that the respons
Externí odkaz:
http://arxiv.org/abs/cond-mat/9904281
Experiments on the temperature and time dependence of the response function and the field cooled magnetisation of a Cu(Mn) spin glass at temperatures below the zero field spin glass temperature are used to explore the non-equilibrium nature of the un
Externí odkaz:
http://arxiv.org/abs/cond-mat/9810314
The time and temperature dependence of the field-cooled magnetization of a three dimensional Ising spin glass, Fe_{0.5}Mn_{0.5}TiO_{3}, has been investigated. The temperature and cooling rate dependence is found to exhibit memory phenomena that can b
Externí odkaz:
http://arxiv.org/abs/cond-mat/9810160
Non-equilibrium dynamics in a Ag(11%Mn) spin-glass has been studied by low frequency ac-susceptibility and magnetic relaxation experiments. The results unequivocally show that spin structures that memorize the cooling process are imprinted in the sys
Externí odkaz:
http://arxiv.org/abs/cond-mat/9809021
Publikováno v:
Phys. Rev. Lett. 81, 3243 (1998)
New low frequency ac susceptibility measurements on two different spin glasses show that cooling/heating the sample at a constant rate yields an essentially reversible (but rate dependent) X(T) curve; a downward relaxation of X occurs during a tempor
Externí odkaz:
http://arxiv.org/abs/cond-mat/9806134
Autor:
Jonason, K, Nordblad, P *
Publikováno v:
In Physica B: Physics of Condensed Matter 2000 279(4):334-340
Publikováno v:
In Journal of Magnetism and Magnetic Materials 1999 196:487-489
Autor:
Jonason, K., Nordblad, P.
Publikováno v:
Journal of Applied Physics; 4/16/1997, Vol. 81 Issue 8, p4400, 3p, 6 Graphs