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Linear and quadratic magnetoelectric (ME) effects in copper chlorine boracite

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Published in Journal de Physique. Colloque. 1988, vol. 49, p. 849-850
Abstract The magnetoelec. effect on a (001)orthorhombic cut Cu-Cl boracite crystal (Cu3B7O13Cl) shows linear and 2nd order components. At 4 K, with P3induced = a33H3 + (b311H12 + b322H22 + b333H32)/2, one obtains: a33 = 1.2 * 10-13 [s/m], b311 ~ 0, b322 = 3.6 * 10-19 [s/A] and b333 = -1.2 * 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).
Keywords Magnetoelec effect copper chlorine boraciteDielec polarization copper chlorine boracite
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Project FNS: 1987
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RIVERA, Jean-Pierre, SCHMID, Hans. Linear and quadratic magnetoelectric (ME) effects in copper chlorine boracite. In: Journal de Physique. Colloque, 1988, vol. 49, p. 849-850. https://archive-ouverte.unige.ch/unige:33099

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