Volume 118, Number 2, April 2017
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||23 June 2017|
Hidden transition in multiferroic and magnetodielectric CuCrO2 evidenced by ac-susceptibility
1 Department of Physics, Indian Institute of Technology (Banaras Hindu University) Varanasi 221005, India
2 School of Physical Sciences, Jawaharlal Nehru University - New Delhi 110067, India
3 Indus Synchrotrons Utilization Division, Raja Ramanna Centre for Advanced Technology Indore 452013, India
4 Department of Physics, Banaras Hindu University - Varanasi 221005, India
5 Thermodynamics Laboratory, UGC-DAE Consortium for Scientific Research Khandwa Road, Indore 452001, India
Received: 16 March 2017
Accepted: 6 June 2017
Ferroelectric polarization, magnetic-field dependence of the dielectric constant and ac and dc magnetizations of frustrated CuCrO2 have been measured. A new spin freezing transition below 32 K is observed which is thermally driven. The nature of the spin freezing is to be a single-ion process. Dilution by the replacements of Cr ions by magnetic Mn ions showed suppression of the spin freezing transition suggesting it to be fundamentally a single-ion freezing process. The observed freezing, which is seemingly associated to geometrical spin frustration, represents a novel form of magnetic glassy behavior.
PACS: 75.50.Lk – Spin glasses and other random magnets / 75.60.Ej – Magnetization curves, hysteresis, Barkhausen and related effects / 77.80.-e – Ferroelectricity and antiferroelectricity
© EPLA, 2017
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