| Issue |
J. Phys. Colloques
Volume 49, Number C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|---|---|---|
| Page(s) | C8-849 - C8-850 | |
| DOI | https://doi.org/10.1051/jphyscol:19888383 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-849-C8-850
DOI: 10.1051/jphyscol:19888383
Université de Genève, Sciences II, 30 q. Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
J. Phys. Colloques 49 (1988) C8-849-C8-850
DOI: 10.1051/jphyscol:19888383
LINEAR AND QUADRATIC MAGNETOELECTRIC (ME) EFFECTS IN COPPER CHLORINE BORACITE
J.-P. Rivera et H. SchmidUniversité de Genève, Sciences II, 30 q. Ernest-Ansermet, CH-1211 Geneva 4, Switzerland
Abstract
The magnetoelectric effect, on a (001)orthorhombic cut CU-Cl boracite crystal (Cu3B7O13Cl) shows linear and second order components. At 4 K, with P3induced = α33H3 + (β311H21 + β322H22 + β333H23) / 2 , one obtains : α33 = 1.2 x 10-13 [s/m], β311 ≈ 0, β322 = 3.6 x 10-19 [s/A] and β333 = -1.2 x 10-19 [s/A], the signs being understood relative to one another. These results, together with the observation of ME butterfly loops, corroborate magnetic point group m'm'2, as deduced from magnetic torque measurements (M. Haida et al., 1975).