Volume 103, Number 4, August 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||16 September 2013|
Piezomagnetism of FeSe single crystals
1 B. Verkin Institute for Low Temperature Physics and Engineering National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
2 Institute for Single Crystals, National Academy of Sciences of Ukraine - 60 Lenin Ave., Kharkov 61001, Ukraine
3 Institute of Experimental Mineralogy - Chernogolovka, Moscow Region, 142432, Russia
4 Low Temperature Physics and Superconductivity Department, Moscow State University - 119991 Moscow, Russia
5 Theoretical Physics and Applied Mathematics Department, Ural Federal University 620002 Ekaterinburg, Russia
Received: 16 May 2013
Accepted: 12 August 2013
The acoustic-electric transformation in high-quality FeSe single crystals is studied. In zero magnetic field we observe an abnormally strong electromagnetic radiation induced by a transverse elastic wave. Usually a radiation of such intensity and polarization is observed only in metals subjected to a high magnetic field (the radiation is caused by the Hall current). We argue that in FeSe in zero magnetic field it is caused by the piezomagnetic effect which is most probably of dynamical origin. We find that the piezomagnetism survives under the transition from the normal to superconducting state. In the superconducting state the electromagnetic signal decreases with decreasing temperature that is connected with the change in the London penetration depth.
PACS: 74.70.Xa – Pnictides and chalcogenides / 74.25.Ha – Magnetic properties including vortex structures and related phenomena / 75.80.+q – Magnetomechanical effects, magnetostriction
© EPLA, 2013
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