Magnetocaloric effect in pyrochlore antiferromagnet Gd2Ti2O7

Abstract

An adiabatic demagnetization process is studied in Gd2Ti2O7, a geometrically frustrated antiferromagnet on a pyrochlore lattice. In contrast to conventional paramagnetic salts, this compound can exhibit a temperature decrease by a factor of ten in the temperature range below the Curie-Weiss constant. The most efficient cooling is observed in the field interval between 120 and 60 kOe corresponding to a crossover between saturated and spin-liquid phases. This phenomenon indicates that a considerable part of the magnetic entropy survives in the strongly correlated state. According to the theoretical model, this entropy is associated with a macroscopic number of local modes remaining gapless till the saturation field. Monte Carlo simulations on a classical spin model demonstrate good agreement with the experiment. The cooling power of the process is experimentally estimated with a view to possible technical applications. The results for Gd2Ti2O7 are compared to those for Gd3Ga5O12, a well-known material for low temperature magnetic refrigeration.

6 pages, 4 figures, accepted version

References in corpus (7)

• Emergent excitations in a geometrically frustrated magnet
• Properties of a classical spin liquid: the Heisenberg pyrochlore antiferromagnet
• Enhanced magnetocaloric effect in frustrated magnets
• Exact low-temperature behavior of kagome antiferromagnet at high fields
• Order in the Heisenberg Pyrochlore: The Magnetic Structure of Gd2Ti2O7
• Multiple Field-Induced Phase Transitions in a Geometrically-Frustrated Dipolar Magnet - Gd2Ti2O7
• Magnetic phase diagram of the antiferromagnetic pyrochlore Gd2Ti2O7

Cited by in corpus (29)

• Thermal Hall conductivity in the frustrated pyrochlore magnet Tb2Ti2O7
• Magnetocaloric effect and magnetic cooling near a field-induced quantum-critical point
• Dynamic and thermodynamic properties of the generalised diamond chain model for azurite
• Exact calculation of the magnetocaloric effect in the spin-1/2 XXZ chain
• Giant magnetocaloric effect in exchange-frustrated GdCrTiO5 antiferromagnet
• Evidence of large magnetic cooling power and double glass transition in Tb5Pd2
• Magnetocaloric effect in two-dimensional spin-1/2 antiferromagnets
• Magnetocaloric Study of Spin Relaxation in `Frozen' Dipolar Spin Ice Dy2Ti2O7
• Cooling through quantum criticality and many-body effects in condensed matter and cold gases
• Fluctuation-Driven Selection at Criticality in a Frustrated Magnetic System: the Case of Multiple-k Partial Order on the Pyrochlore Lattice
• Magnetic ordered structure dependence of magnetic refrigeration efficiency
• Field induced magnetic order in the frustrated magnet Gadolinium Gallium Garnet
• Magneto-thermal properties of the spin-s Heisenberg antiferromagnet on the cuboctahedron
• Spin-liquid dynamics of pyrochlore magnets Gd2Ti2O7 and Gd2Sn2O7
• Unconventional superparamagnetic behavior in the modified cubic spinel compound LiNi${}_{0.5}$Mn${}_{1.5}$O${}_4$
• Magnetocaloric properties of frustrated tetrahedra-based spin nanoclusters
• Magnetic resonance in a pyrochlore antiferromagnet Gd2Ti2O7
• Novel magnetic phases in a Gd2Ti2O7 pyrochlore for a field applied along the [100] axis
• Magnetic properties of the quasi two-dimensional centered honeycomb antiferromagnet GdInO${}_3$
• Spin dynamics of the quantum dipolar magnet Yb${}_3$Ga${}_5$O${}_{12}$ in an external field
• Enhancement of the Magnetocaloric Effect in Geometrically Frustrated Cluster Spin Glass Systems
• Residual entropy of the dilute Ising chain in a magnetic field
• Magnetocaloric effect in integrable spin-s chains
• Microscopic spin Hamiltonian for a dipolar-Heisenberg magnet LiGdF4 from EPR measurements
• Mixed-spin system with supersolid phases: Magnetocaloric effect and thermal properties
• Magnetocaloric properties of a frustrated Blume-Capel antiferromagnet
• Reminiscence of a magnetization plateau in a magnetization processes of toy-model triangular and tetrahedral clusters
• Magnetic and magnetocaloric effect in the stuffed honeycomb antiferromagnet GdInO3 polycrystalline
• Effect of Single-ion Anisotropy on Magnetocaloric Properties of Frustrated Spin-$s$ Ising Nanoclusters