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
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Journal ArticleDOI
Magnetoelectric dipole interaction in RF-magnetron sputtered (1 − x) BiFeO3–xBaTiO3 thin films
TL;DR: In this article, a multiferroic thin film optimized for x ǫ = 0.1 and optimized for 0.3 GHz with applied magnetic field was analyzed for multi-functional spintronic devices.
Journal ArticleDOI
High Curie temperature Pb(Fe1/2Nb1/2)O3-based ferroelectrics: 0.40Pb(Fe1/2Nb1/2)O3-0.34PbZrO3-0.26PbTiO3
TL;DR: In this article, the frequency and temperature dependence of the dielectric response and polarization relaxation were investigated in high-temperature high-power-density electrotransducers and high temperature capacitors.
Journal ArticleDOI
A comparison of random anisotropy and spin glass properties in several amorphous rare‐earth alloys
TL;DR: In this paper, magnetic measurements on the amorphous (a) alloys a−Dy0.52Cu0.48, a−Gd0.37Al0.63, and a´Gd 0.52Ag0.68 were reported, and compared to a recent theory for random anisotropy systems.
Journal ArticleDOI
Existence of a Thermodynamic Spin-Glass Phase in the Zero-Concentration Limit of Anisotropic Dipolar Systems
Juan Carlos Andresen,Juan Carlos Andresen,Helmut G. Katzgraber,Helmut G. Katzgraber,Vadim Oganesyan,Vadim Oganesyan,Moshe Schechter +6 more
TL;DR: In this article, a spin-glass state persists even for extremely low ion concentrations, and it is shown that a spinglass state can be maintained even in extremely low magnetic ion concentrations.
Journal ArticleDOI
The XY model with random p-fold anisotropy: Dynamics and statics near two dimensions
TL;DR: In this paper, the phase structure and renormalization group behavior of the XY model with p -fold random anisotropy was studied via time-dependent Langevin formulation and the statics and dynamics of the model were derived in two dimensions and extended to 2 + ϵ dimensions without the use of replicas.
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