UNIGE document Scientific Article
previous document  unige:31346  next document
add to browser collection

Magnetic measurements and magnetoelectric effect of pyroelectric KNiPO4 single crystals

Kizhaev, Sergei
Mettout, B.
show hidden authors show all authors [1 - 9]
Published in Ferroelectrics. 1994, vol. 161, no. 1-4, p. 77-89
Abstract Single crystals of KNiPO4 were synthesized in a KCl flux. The crystals have the orthorhombic space group Pna21 at room temp. with a = 8.6333(5), b = 9.2565(5) and c = 4.9064(9)[.ANG.]. Ferroelectric 180 Deg domains, parallel to [001] were revealed by chemical etching. Magnetization measurements along all three orthorhombic axis, made on a SQUID magnetometer, show a magnetic phase transition to the antiferromagnetic state at TN(25 +- 0.5) K with a weak ferromagnetic behavior. All possible coeffs. of the linear magnetoelec. effect have been tested, only a12 and a21 were found to be non zero. These components of the linear magnetoelec. effect are consistent with magnetic point group mm2 which was also found by neutron diffraction studies. However, this magnetic point group does not allow weak ferromagnetism, which is also obsd. The pyroelec. nature of this compd. has also been put into evidence by measuring a change of the spontaneous polarization DPs = 0.61 [mC cm-2] between 4 and 300 K. The total pyroelectric coefficient at 300 K is p3 = 2.75 x 10-5 [Cm-2] K-1].
Keywords Magnetic property and MagnetismMagnetoelectric effect (of nickel potassium phosphate single crystals)
Full text
Article (Published version) (580 Kb) - document accessible for UNIGE members only Limited access to UNIGE
Project FNS: 1993
(ISO format)
LUJAN PEREZ, Marcos Luis et al. Magnetic measurements and magnetoelectric effect of pyroelectric KNiPO4 single crystals. In: Ferroelectrics, 1994, vol. 161, n° 1-4, p. 77-89. doi: 10.1080/00150199408213356 https://archive-ouverte.unige.ch/unige:31346

406 hits

0 download


Deposited on : 2013-11-26

Export document
Format :
Citation style :