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Title

Studies of single-crystalline tetragonal tungsten bronze type K3Fe5F15, a potential magnetoelectric material

Authors
Kita, E.
Published in Ferroelectrics. 1994, vol. 162, no. 1-4, p. 51-62
Abstract Two phase transitions of K3Fe5F15, at about 290 and 120 K, have been identified by polarized light microscopy and magnetic measurements on a single crystal grown from high temp. soln. with subsequent quenching from 973 K. The former one at about 290 K is a new second-order structural transition from the orthorhombic to a monoclinic phase, as shown by the appearance of new types of ferroelastic domain walls and a rotation of the optical indicatrix around the pseudo-tetragonal principal axis. The transition at about 120 K is second order and magnetic nature, accompanied by anomalies of spontaneous linear birefringence and antiferromagnetic type magnetic susceptibility. The temp. dependence of the magnetization suggests that a spontaneous ferromagnetic component appears in the magnetically ordered phase below 120 K.
Keywords Tetragonal tungsten bronze type fluorideK3Fe5F15Mixed valencyPhase transitionsPolarized light microscopyMagnetization measurements
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Structures
Project FNS: 1993
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ISHIHARA, Shozo et al. Studies of single-crystalline tetragonal tungsten bronze type K3Fe5F15, a potential magnetoelectric material. In: Ferroelectrics, 1994, vol. 162, n° 1-4, p. 51-62. https://archive-ouverte.unige.ch/unige:31210

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Deposited on : 2013-11-20

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