The synergy between experiment, theory, and simulations enables a microscopic analysis of spin-glass dynamics in a magnetic field in the vicinity of and below the spin-glass transition temperature Tg. The spin-glass correlation length,ξ(t,tw;T), is analysed both in experiments and in simulations in terms of the waiting time tw after the spin glass has been cooled down to a stabilised measuring temperature T < Tg and of the time t after the magnetic field is changed. This correlation length is extracted experimentally for a CuMn 6 at. % single crystal, as well as for simulations on the Janus II special-purpose supercomputer, the latter with time and length scales comparable to experiment. The non-linear magnetic susceptibility is reported from experiment and simulations, using ξ(t,tw;T) as the scaling variable. Previous experiments are reanalysed, and disagreements about the nature of the Zeeman energy are resolved. The growth of the spin-glass magnetisation in zero-field magnetisation experiments, M_ZFC(t,tw;T), is measured from simulations, verifying the scaling relationships in the dynamical or non-quilibrium regime. Our preliminary search for the de Almeida-Thouless line in D= 3 is discussed.

Spin-glass dynamics in the presence of a magnetic field: exploration of microscopic properties / Paga, I.; Zhai, Q.; Baity-Jesi, M.; Calore, E.; Cruz, A.; Fernandez, L. A.; Gil-Narvion, J. M.; Gonzalez-Adalid Pemartin, I.; Gordillo-Guerrero, A; Iñiguez, D.; Maiorano, A.; Marinari, E.; Martin-Mayor, V.; Moreno-Gordo, J.; Muñoz-Sudupe, A.; Navarro, D.; Orbach, R. L.; Parisi, G.; Perez-Gaviro, S.; Ricci-Tersenghi, F.; Ruiz-Lorenzo, J. J.; Schifano, S. F.; Schlagel, D. L.; Seoane, B.; Tarancon, A.; Tripiccione, R.; Yllanes, D.. - In: JOURNAL OF STATISTICAL MECHANICS: THEORY AND EXPERIMENT. - ISSN 1742-5468. - (2021).

Spin-glass dynamics in the presence of a magnetic field: exploration of microscopic properties

I. Paga
Primo
;
A. Maiorano;E. Marinari;G. Parisi;F. Ricci-Tersenghi;
2021

Abstract

The synergy between experiment, theory, and simulations enables a microscopic analysis of spin-glass dynamics in a magnetic field in the vicinity of and below the spin-glass transition temperature Tg. The spin-glass correlation length,ξ(t,tw;T), is analysed both in experiments and in simulations in terms of the waiting time tw after the spin glass has been cooled down to a stabilised measuring temperature T < Tg and of the time t after the magnetic field is changed. This correlation length is extracted experimentally for a CuMn 6 at. % single crystal, as well as for simulations on the Janus II special-purpose supercomputer, the latter with time and length scales comparable to experiment. The non-linear magnetic susceptibility is reported from experiment and simulations, using ξ(t,tw;T) as the scaling variable. Previous experiments are reanalysed, and disagreements about the nature of the Zeeman energy are resolved. The growth of the spin-glass magnetisation in zero-field magnetisation experiments, M_ZFC(t,tw;T), is measured from simulations, verifying the scaling relationships in the dynamical or non-quilibrium regime. Our preliminary search for the de Almeida-Thouless line in D= 3 is discussed.
2021
Spin glasses, disorder system, theory and experiments
01 Pubblicazione su rivista::01a Articolo in rivista
Spin-glass dynamics in the presence of a magnetic field: exploration of microscopic properties / Paga, I.; Zhai, Q.; Baity-Jesi, M.; Calore, E.; Cruz, A.; Fernandez, L. A.; Gil-Narvion, J. M.; Gonzalez-Adalid Pemartin, I.; Gordillo-Guerrero, A; Iñiguez, D.; Maiorano, A.; Marinari, E.; Martin-Mayor, V.; Moreno-Gordo, J.; Muñoz-Sudupe, A.; Navarro, D.; Orbach, R. L.; Parisi, G.; Perez-Gaviro, S.; Ricci-Tersenghi, F.; Ruiz-Lorenzo, J. J.; Schifano, S. F.; Schlagel, D. L.; Seoane, B.; Tarancon, A.; Tripiccione, R.; Yllanes, D.. - In: JOURNAL OF STATISTICAL MECHANICS: THEORY AND EXPERIMENT. - ISSN 1742-5468. - (2021).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1496411
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