Electron spin resonance study of anisotropic interactions in a two-dimensional spin-gap magnet (C<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow/><mml:mn>4</mml:mn></mml:msub></mml:math>H<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow/><mml:mn>12</mml:mn></mml:msub></mml:math>N<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow/><mml:mn>2</mml:mn></mml:msub></mml:math>)(Cu<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow/><mml:mn>2</mml:mn></mml:msub></mml:math>Cl<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mrow/><mml:mn>6</mml:mn></mml:msub></mml:math>)
V. N. GlazkovP.L. Kapitza Institute for Physical ProblemsTatiana S. YankovaNeutron Scattering and Magnetism, Institute for Solid State Physics, ETH Zürich, CH-8093 Zürich, SwitzerlandJ. SichelschmidtP.L. Kapitza Institute for Physical ProblemsD. HüvonenKapitza Institute for Physical Problems RAS, Kosygin Street 2, 119334 Moscow, Russia and Neutron Scattering and Magnetism, Institute for Solid State Physics, ETH Zürich, CH-8093 Zürich, SwitzerlandA. ZheludevNeutron Scattering and Magnetism, Institute for Solid State Physics, ETH Zürich, CH-8093 Zürich, Switzerland
2012lv
ABI
Annotatsiya
Fine details of the excitation spectrum of the two-dimensional spin-gap magnet PHCC are revealed by electron spin resonance investigations. The values of anisotropy parameters and the orientations of the anisotropy axes are determined by accurate measurements of the angular, frequency-field, and temperature dependencies of the resonance absorption. The properties of a spin-gap magnet in the vicinity of critical field are discussed in terms of sublevel splittings and $g$-factor anisotropy.
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