Unconventional magnets in external magnetic fields

Details Unconventional magnets in external magnetic fields Unconventional magnets in external magnetic fields

2010-04-13

arxiv.org/abs/1004.2194v1

Journal of Physics: Conference Series 145 (2009) 012001

Physics

Condensed Matter

Strongly Correlated Electrons

Plenary Talk at HFM 2008 Conference

Scientific paper

10.1088/1742-6596/145/1/012001

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 $d \geq 2$. 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.

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