Out-of-Equilibrium Dissipative &amp;lt;i&amp;gt;ac&amp;lt;/i&amp;gt;—Susceptibility in Quantum Ising Spin Glass

Busiello, G.

doi:10.4236/jmp.2013.46108

Cited by 1 publication

(1 citation statement)

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“…In our present study, the temperature and magnetic field sweep rates dependent measurements also demonstrate the decay of ∆χ ′ (T, H dc ) in a short time t. It indicates that in the out-ofequilibrium state, field-induced quench disorder sites develop a dynamic spin-correlation of larger τ and exists for a shorter time t [15]. This field-induced dynamic correlation additionally contributes to the χ ′ in out-of-equilibrium state and χ ′ (T, H dc ) can be represented as a sum of stationary part (χ ′ ST ) and non-stationary part (χ ′ NST ) [35]:…”

Section: Discussionmentioning

confidence: 99%

Emergence of field-induced memory effect in spin ices

Yadav,

Upadhyay,

Kumar

et al. 2023

J. Phys.: Condens. Matter

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Out-of-equilibrium investigation of strongly correlated materials deciphers the hidden equilibrium properties. Herein, we have investigated the out-of-equilibrium magnetic properties of polycrystalline Dy2Ti2O7 and Ho2Ti2O7 spin ices. Our experimental findings reveal the emergence of magnetic field-induced anomalous hysteresis observed solely in temperature-and magnetic field-dependent AC susceptibility measurements. The observed memory effect (anomalous thermomagnetic hysteresis) exhibits a strong dependence on both thermal and non-thermal driving variables. Owing to the non-collinear spin structure, the applied DC bias magnetic field produces quenched disorder sites in the cooperative Ising spin matrix and suppresses the spin-phonon coupling. These quench disorders create a dynamic spin correlation, having slow spin relaxation and quick decay time, which additionally contribute to AC susceptibility. The initial conditions and measurement protocol decide the magnitude and sign of this dynamical term contributing to AC susceptibility. It is being suggested that such out-of-equilibrium properties arise from the combined influences of geometric frustration, disorder, and the cooperative nature of spin dynamics exhibited by these materials.

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Section: Discussionmentioning

confidence: 99%