Ultrasonic experiments in SrCu2(BO3)2 and NH4CuCl3 in magnetic fields up to 50T

Wolf, B.; Жерлицын, С.; Schmidt, S.; Schwenk, H.; Lüthi, B.; Kageyama, Hiroshi; Ueda, Y.; Tanaka, Hidekazu

doi:10.1016/s0304-8853(01)00093-2

Cited by 1 publication

(2 citation statements)

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“…We note that the discontinuity in the field dependence of the elastic constant is negative at the transition. This kind of discontinuous change and the linear field dependence in the ordered phase have been measured in NH 4 CuCl 3 for the elastic constant c 66 by Schmidt et al [11][12][13] From their data, they suggested that there is a certain scaling of the field dependence of c and the differential uniform susceptibility, χ = ∂M/∂H:…”

Section: Elastic Constantmentioning

confidence: 80%

“…They found a discontinuity in the field dependence of the elastic constant at the transition with a linear field dependence in the ordered phase. [11][12][13] They discuss that the field dependence of the elastic constants in the ordered phases resembles very much that of the uniform differential susceptibility, dM/dH. The thermal expansion in TlCuCl 3 , measured by Johannsen et al, indicates a strong uniaxial pressure dependence of the magnon gap.…”

Section: Introductionmentioning

confidence: 99%

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Ehrenfest Relations and Magnetoelastic Effects in Field-induced Ordered Phases

Matsumoto

Sigrist

2005

J. Phys. Soc. Jpn.

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Magnetoelastic properties in field-induced magnetic ordered phases are studied theoretically based on a Ginzburg-Landau theory. A critical field for the field-induced ordered phase is obtained as a function of temperature and pressure, which determine the phase diagram. It is found that magnetic field dependence of elastic constant decreases discontinuously at the critical field, Hc, and that it decreases linearly with field in the ordered phase (H > Hc). We found an Ehrenfest relation between the field dependence of the elastic constant and the pressure dependence of critical field. Our theory provides the theoretical form for magnetoelastic properties in field-and pressure-induced ordered phases.

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Section: Elastic Constantmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%