Europhys. Lett, 48 (2), pp. 182-186 (1999)
Soundwave propagation in pulsed magnetic fields in
B. Wolf, S. Zherlitsyn, S. Schmidt and B. Lüthi
Physikalisches Institut, Johann Wolfgang Goethe Universität Frankfurt
Robert Mayerstr.2-4, 60054 Frankfurt/Main, Germany
(received 28 June 1999; accepted 20 August 1999)
PACS. 62.65 - Acoustical properties of solids.
PACS. 75.30Kz - Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.).
PACS. 43.20Hq - Velocity and attenuation of acoustic waves.
We present for the first time ultrasonic velocity and attenuation measurements in pulsed magnetic fields up to 50 T. A quadrature method was used which allows us to measure velocity and attenuation changes simultaneously. To demonstrate this new experimental technique for pulsed field experiments we determine the elastic properties of the triangular antiferromagnet . This substance exhibits different spin phases as a function of magnetic field showing spectacular effects in propagating sound waves. Our pulsed field experiments reveal new features of these magnetic phases.
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