Magneto-acoustic properties of UCuGe single crystal

0343107 - FZÚ 2011 RIV US eng J - Článek v odborném periodiku
Yasin, S. - Andreev, Alexander V. - Sytcheva, A. - Wosnitza, J. - Zherlitsyn, S.
Magneto-acoustic properties of UCuGe single crystal.
Journal of Low Temperature Physics. Roč. 159, 1-2 (2010), 105-108. ISSN 0022-2291. E-ISSN 1573-7357
Grant CEP: GA ČR GA202/09/0339
Grant ostatní: EuroMagNET(XE) 228043
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: ultrasound * UTX compounds * pulse fields * field-induced transition
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 1.403, rok: 2010

Field and temperature dependence of sound-velocity and sound-attenuation were studied on a single crystal of the antiferromagnetic UCuGe (TN = 48 K). The temperature dependences of the sound velocity and attenuation display a pronounced anomaly at TN, which is evidence for a strong magneto-elastic interaction. The pulse-field measurements at 4.2 K show a minimum in the sound velocity followed by a jump-like anomaly at 37 T, and another kink-like anomaly at 48–49 T. These anomalies are due to field-induced spin rearrangements as measured in magnetization studies. In the paramagnetic state, both acoustic characteristics show large frequency-dependent changes revealing the presence of an unusual relaxation mechanism which might be due to vacancy dynamics.
Trvalý link: http://hdl.handle.net/11104/0185660