UNIGE document Scientific Article
previous document  unige:31343  next document
add to browser collection
Title

Magnetoelectric effect and magnetic torque of chromium chlorine boracite Cr3B7O13Cl

Authors
Haida, M
Kohn, K.
Published in Ferroelectrics. 1994, vol. 161, no. 1-4, p. 99-110
Abstract The magnetoelectricity of the boracite Cr3B7O13Cl has been studied by quasi-static and dynamic magnetoelec. (ME)H measurements on (001)cub platelets with a ferroelastic/ferroelec. single domain state, obtained by poling with an elec. field of E - 45 kV.cm-1, applied upon cooling through the 42mL' -> mm21' phase transition at 160 K. The magnetoelec. effect has been found to be essentially quadratic with typical values of the ME tensor components b333 = 1.5 x 10-18 [s/A] and b322 = 4 x 10-19 [s/A] at 4.2 K, whereas the linear ME coeff. a33 shows strangely small and fluctuating values of the order of 5 x 10-14 [s/m]. The temp. dependence of the ME effect has been measured between 1.8 and 40 K, indicating a spread max. of b333 near 11 K. The magnetic torque showed a not completely quadratic dependence vs. magnetic field at 4.2 K, thus suggesting the contribution of weakly ferromagnetic ordering. The information obtained at this stage of study permits one to derive the magnetic symmetry of Cr3B7O13Cl at 4.2 K only tentatively to be the orthorhombic with point group m'm'2, implying a very weak spontaneous magnetization parallel to the twofold polar axis. The temp. dependence of the spontaneous polarization Ps has been investigated down to 4 K. [on SciFinder (R)]
Keywords Magnetoelectricity chromium chlorine boraciteFerroelectricity chromium chlorine boraciteFerroelastic domain chromium chlorine boraciteFerromagnetism chromium chlorine boraciteMagnetic torque chromium chlorine boracite
Full text
Article (Published version) (4.1 MB) - public document Free access
Structures
Project FNS: 1993
Citation
(ISO format)
YE, Zuo-Guang et al. Magnetoelectric effect and magnetic torque of chromium chlorine boracite Cr3B7O13Cl. In: Ferroelectrics, 1994, vol. 161, n° 1-4, p. 99-110. https://archive-ouverte.unige.ch/unige:31343

191 hits

97 downloads

Update

Deposited on : 2013-11-26

Export document
Format :
Citation style :