Field dependence of the transverse spin glass phase transition: Quantitative agreement between Monte Carlo simulations and experiments

2012 ◽  
Vol 111 (7) ◽  
pp. 07E108 ◽  
Author(s):  
A. D. Beath ◽  
D. H. Ryan ◽  
J. M. Cadogan ◽  
J. van Lierop
Keyword(s):  
Phase Transition ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Spin Glass ◽  
Field Dependence ◽  
Glass Phase ◽  
Quantitative Agreement ◽  
Transverse Spin ◽  
Spin Glass Phase

Monte Carlo simulation of the equilibrium spin glass phase in disordered assemblies of magnetic nanoparticles

2009 ◽  
Author(s):  
Julio F. Fernández ◽  
Juan J. Alonso ◽  
Joaquín Marro ◽  
Pedro L. Garrido ◽  
Pablo I. Hurtado
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Magnetic Nanoparticles ◽  
Spin Glass ◽  
Glass Phase ◽  
Spin Glass Phase

scholarly journals Effect of the paramagnetic to spin-glass phase transition on the fundamental absorption edge of MnIn2Se4 magnetic semiconducting compound

2018 ◽  
Vol 65 (1) ◽  
pp. 14
Author(s):  
Carlos Gustavo Rincón
Keyword(s):  
Phase Transition ◽  
Spin Glass ◽  
Glass Phase ◽  
Energy Gap ◽  
Magnetic Moments ◽  
Fundamental Absorption Edge ◽  
Theoretical Models ◽  
Freezing Temperature ◽  
Layered Compound ◽  
Spin Glass Phase

    The temperature dependence of the indirect and direct fundamental band gaps of the layered compound MnIn2Se4,that crystallizes in a rhombohedral defect structure with space group R -3m (D5/3d), was studied by optical absorption spectra. The data were analyzedin terms of current theoretical models that take into account the contribution of antiferromagnetic exchange interaction between spins to the shift of the energy gap EG with T in the vicinity of the critical paramagnetic to spin-glass phase transition. It was established that short- and long-range effect spin correlations dominate the contribution to this shift in the critical region below about 20 K, near the spin-glass freezing temperature Tf, and noncritical one, between about 70 and 160 K, far from Tf, respectively. An intermediate temperature region, compatible with the behaviour expected for a cluster-glass transition where a gradual freezing of the magnetic moments occurs, was also observed.

Spin glass phase transition in random-axes XY magnet

1982 ◽  
Vol 15 (18) ◽  
pp. L565-L568 ◽  
Author(s):  
V S Dotsenko ◽  
M V Feigelman
Keyword(s):  
Phase Transition ◽  
Spin Glass ◽  
Glass Phase ◽  
Spin Glass Phase

Nonlinear Magnetization at the Spin Glass Phase Transition Temperature

1979 ◽  
Vol 46 (6) ◽  
pp. 1951-1952 ◽  
Author(s):  
Yoshihito Miyako ◽  
Susumu Chikazawa ◽  
Toshiaki Saito ◽  
Y. G. Yuochunas
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Spin Glass ◽  
Phase Transition Temperature ◽  
Glass Phase ◽  
Spin Glass Phase ◽  
Nonlinear Magnetization

scholarly journals Influence of Concentration Fluctuations on Relaxation Processes in Spin Glasses

2018 ◽  
Vol 2 (4) ◽  
pp. 26 ◽  
Author(s):  
Julia Wagner ◽  
Wolfgang Häußler ◽  
Olaf Holderer ◽  
Andreas Bauer ◽  
Stephen Shapiro ◽  
...  
Keyword(s):  
Phase Transition ◽  
Spin Glass ◽  
Spin Glasses ◽  
Glass Phase ◽  
Concentration Fluctuations ◽  
Neutron Resonance ◽  
Relaxation Processes ◽  
Local Concentration ◽  
Spin Glass Phase ◽  
Resonance Spin

Using the unique combination of atomically resolved atom probe tomography (APT) and volume averaged neutron (resonance) spin echo (NRSE and NSE) experiments, the influence of nano-scaled clusters on the spin relaxation in spin glasses was studied. For this purpose, the phase transition from the paramagnetic phase to the spin glass phase in an Fe-Cr spin glass with a composition of Fe 17 . 8 Cr 82 . 2 was studied in detail by means of NRSE. The microstructure was characterised by APT measurements, which show local concentration fluctuations of Fe and Cr on a length scale of 2 to 5 nm, which lead (i) to the coexistence of ferro- and anti-ferromagnetic clusters and (ii) a change of the magnetic properties of the whole sample, even in the spin glass phase, where spins are supposed to be randomly frozen. We show that a generalized spin glass relaxation function, which was successfully used to describe the phase transition in diluted spin glasses, can also be used for fitting the spin dynamics in spin glasses with significant concentration fluctuations.

Sign in / Sign up

Export Citation Format

Share Document