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unige:32946 
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Are antiferroelectricity and other physical properties 'hidden' in spinel compounds? |
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| Published in | Journal of Physics. C, Solid State Physics. 1974, vol. 7, no. 15, p. 2697-2706 | |
| Abstract | The piezoelec. switching of antiferroelec. domains by the simultaneous application of an elec. field Ei and mechanical stress T jkis proposed as a direct method for examg. whether some spinel compns. do have point symmetry 43m and concomitant antiferroelec. ordering as proposed by Grimes. For piezoelec. antiferroelecs., the switching energy is Δg = 2dijkEiT jk (dijk = piezoelec. coeff.). For point symmetry 43m, various possible switching procedures have been described in detail. The smallest coercive product of elec. field and stress (E T jk)c is required for switching when the elec. field is chosen along cubic [001], and directional stress along [110] or [110]. For particular directions, for example [111], the colinear application of elec. field and stress also leads to switching. If the assumed prototype with space group F43m (the symmetry proposed by Grimes) is supposed to undergo a phase transition leading to ferrimagnetism, the possible symmetries of the ferrimagnetic domains are given by the magnetic groups I4m'2], Im'm2], and R3m', which are M-maximal subgroups of the prototype magnetic group F43m1]. All 3 ferrimagnetic phases permit piezoelectricity, piezomagnetism, and the linear and 2nd-order magnetoelec. effect. The tetragonal phase (I4m'2]) remains antiferroelec. as the prototype is supposed to be, whereas the orthorhombic (Im'm2]) and trigonal (R3m') phases become ferroelec. The full lattice of subgroups of F43m1] is presented. | |
| Keywords | Ferroelectric domain — Ferroelectricity — Spinels Role — Magnetic property and Magnetism — Antiferroelectricity spinel | |
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Article (Published version) (616 Kb) - Free access Other version: http://stacks.iop.org/0022-3719/7/i=15/a=019?key=crossref.1888139d1b2aac0fc182d8a1e1002cf1 |
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| Citation (ISO format) | SCHMID, Hans, ASCHER, Edgar. Are antiferroelectricity and other physical properties 'hidden' in spinel compounds?. In: Journal of Physics. C, Solid State Physics, 1974, vol. 7, n° 15, p. 2697-2706. https://archive-ouverte.unige.ch/unige:32946 |
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