Unconventional magnets in external magnetic fields

Abstract

This short review surveys phenomena observed when a magnetic field is applied to a system of localised spins on a lattice. Its focus is on frustrated magnets in dimension $d\ge 2$. The interplay of field and entropy is illustrated in the context of their unusual magnetocaloric properties, where field-tuned degeneracies assert themselves. Magnetisation plateaux can reveal the physics of fluctuations, with unusual excitations (such as local modes, extended string defects or monopoles) involved in plateau termination. Field-tuning lattice geometry is the final topic, where mechanisms for dimensional reduction and conversion between different lattice types are discussed.

Plenary Talk at HFM 2008 Conference

References in corpus (11)

• Bose-Einstein Condensation in Magnetic Insulators
• Enhanced magnetocaloric effect in frustrated magnets
• Why spin ice obeys the ice rules
• Exact low-temperature behavior of kagome antiferromagnet at high fields
• Spinons and triplons in spatially anisotropic frustrated antiferromagnets
• Theory of the [111] magnetization plateau in spin ice
• Pinch Points and Kasteleyn Transitions: How Spin Ice Changes its Entropy
• Magnetization process of spin ice in a [111] magnetic field
• Quantum kagome antiferromagnet in a magnetic field: Low-lying non-magnetic excitations versus valence-bond crystal order
• Bond order from disorder in the planar pyrochlore magnet
• Magnetization plateaus and sublattice ordering in easy axis Kagome lattice antiferromagnets

Cited by in corpus (1)

• Magnetic phase diagrams of classical triangular and kagome antiferromagnets