High-Field Calorimetric Studies on Low-Dimensional and Frustrated Quantum Magnets

Abstract

Significant advances in the experimentally measuring high-field entropy have been made over the last three decades, which have improved our knowledge of magnetic materials. This article reviews the methods of measuring high-field entropy and describes their applications to low-dimensional and=or frustrated magnets. In these magnets, the three-dimensional long-range ordering can be suppressed or emerged by applying magnetic fields, in which characteristic physical properties are induced with an exotic magnetic ground state. Entropy measurements have helped to characterize the exotic ground states and have provided a better understanding of the physical mechanism underlying the field-induced phenomena. With a particular focus on the relationship between the exotic ground state and its thermodynamic properties, the successful calorimetric studies in the literature are reviewed.