Journal ArticleDOI
Random-Field Instability of the Ordered State of Continuous Symmetry
Yoseph Imry,Shang-keng Ma +1 more
TLDR
In this article, it was shown that when the order parameter has a continuous symmetry, the ordered state is unstable against an arbitrarily weak random field in less than four dimensions and the borderline dimensionality above which mean-field-theory results hold is six.Abstract:
Phase transitions are considered in systems where the field conjugate to the order parameter is static and random. It is demonstrated that when the order parameter has a continuous symmetry, the ordered state is unstable against an arbitrarily weak random field in less than four dimensions. The borderline dimensionality above which mean-field-theory results hold is six. (auth)read more
Citations
More filters
Journal ArticleDOI
On Random Field Induced Ordering in the Classical XY Model
TL;DR: In this article, the authors studied the behavior of a weak random external field pointing along the Y axis with strength e and showed that whenever the inverse temperature β is larger than some β(e), there is strong residual ordering along the X direction.
Journal ArticleDOI
Transient electrical response of K0,30MoO3: effects of isoelectronic dopants
TL;DR: In this paper, the authors examined the variation of threshold fields and the transient response of tungsten and rubidium- substituted K 0.30MoO3 samples and found that the dc threshold electric field for the onset of nonlinear behavior scales linearly with Tungsten concentration, but varies as the square of the Rubidium concentration, indicating strong and weak pinning effects.
Journal ArticleDOI
Magnetization curve and magnetic correlations in a nanochain of ferromagnetic grains with random anisotropy
TL;DR: In this article, the magnetization curve and magnetization correlation function are calculated for a ferromagnetic chain of single-domain nanoparticles with a randomly oriented anisotropy axis for different ratios between the exchange correlation and anisotropic energies.
Journal ArticleDOI
A possible glass-like state in θ-(BEDT-TTF)2CsZn(SCN)4 at low temperature
TL;DR: In this paper, the results of measurements of conductivity and dielectric permittivity of the quasi-two-dimensional organic salt (BEDT-TTF)2CsZn(SCN)4 along the in-plane direction in a wide temperature range from room temperature down to liquid helium temperature were presented.
Journal ArticleDOI
Phase transitions in random anisotropy magnets
TL;DR: In this article, a study of magnetic properties and phase transitions in random anisotropy glasses rich in the rare-earth elements Gd, Tb and Nd is presented.
Related Papers (5)
Rounding of First-Order Phase Transitions in Systems with Quenched Disorder
Michael Aizenman,Jan Wehr +1 more