Magnetic excitations in the quantum spin system NH4CuCl3
A. Oosawa, T. Ono, K. Kakurai, H. Tanaka
TL;DR
This study investigates magnetic excitations in NH4CuCl3, revealing two weakly dispersive magnetic modes and their dispersion relations, contributing to understanding quantum spin systems with magnetization plateaus.
Contribution
First detailed neutron scattering analysis of magnetic excitations in NH4CuCl3, identifying two weakly dispersive modes and their dispersion relations.
Findings
Two well-defined magnetic excitations observed.
Dispersion relations determined along four directions.
Excitations are weakly dispersive.
Abstract
NH4CuCl3 has two magnetization plateaus at one-quarter and three-quarters of the saturation magnetization, irrespective of the external field direction. Magnetic excitations in NH4CuCl3 have been investigated by means of neutron inelastic scattering experiments. The constant-Q energy scan profiles were collected in a*-c* plane. Two well-defined magnetic excitations were observed. The dispersion relations along four different directions were determined. Both excitations are found weakly dispersive. The results were compared with those obtained from the ESR measurements.
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Taxonomy
TopicsSolid-state spectroscopy and crystallography · Inorganic Fluorides and Related Compounds · Organic and Molecular Conductors Research