Eur. Phys. J. E (2008) 26: 355-360
https://doi.org/10.1140/epje/i2007-10338-5

Magneto-orientational properties of ionically stabilized aqueous dispersions of Ni(OH)₂ nanoplatelets

¹ Laboratoire des Liquides Ioniques et Interfaces Chargées UMR CNRS 7612, Université Pierre et Marie Curie (Paris 6), ESPCI, case 51, 4, place Jussieu, 75252, Paris Cedex 05, France
² LGPMC EA 3325 Université de la Nouvelle Calédonie B.P. R4, 145 ave. James Cook, 98851, Nouméa Cedex, France
³ Institute of Continuous Media Mechanics, Ural Branch of RAS, 1, Korolyov street, Perm, 614013, Russia
⁴ Instituto de Ciências Exatas, Departamento de Física, Universidade Federal de Minas Gerais, av. Antônio Carlos 6628, CP702 Pampulha, 30123-970, Belo Horizonte, MG, Brasil

^* e-mail: regine.perzynski@upmc.fr

Received: 13 September 2007
Revised: 1 February 2008
Published online: 20 June 2008

Abstract

Magnetic and orientational behavior of nickel hydroxide nanoplatelets ionically stabilized in a liquid matrix is studied. Under an applied field the platelets orient their faces normal to its direction. For characterization of the individual behavior of dispersed and non-interacting particles three techniques are used: SAXS, SQUID and magneto-optics. Analysis reveals that nickel hydroxide in a platelet phase is paramagnetic with a pronounced anisotropy of the intrinsic susceptibility, the major component of which (in the direction normal to platelet face) exceeds the minor one by about 25%.