Issue 45, 2008

Magnetization plateaus in Ca3Co2O6 thin films

Abstract

Continuous Ca3Co2O6 thin films were fabricated on Al2O3(001) substrate by pulsed laser deposition. X-ray diffraction and cross-section transmission electron microscopy show that the deposited films are polycrystalline without any secondary phases. The magnetic properties of the films are similar to those reported for bulk polycrystalline samples. At low temperatures, the films exhibit a magnetic transition at 20 K towards a 3D long range ferrimagnetic order. At 10 and 2 K, steps of magnetization have been observed and related to the ferrimagnetic–ferromagnetic transition and to magnetization quantum tunneling phenomena, respectively. This behavior is promoted by the frustrated antiferromagnetic interaction between the Ising-type Co chains of Ca3Co2O6 and by the spin configuration of the octahedral Co3+ ions. Such layers with magnetic properties similar to those of the bulk were obtained here for the first time. This result opens new perspective for the integration of these materials in thermoelectric or spintronic devices.

Graphical abstract: Magnetization plateaus in Ca3Co2O6 thin films

Article information

Article type
Paper
Submitted
22 Jul 2008
Accepted
17 Sep 2008
First published
22 Oct 2008

J. Mater. Chem., 2008,18, 5543-5546

Magnetization plateaus in Ca3Co2O6 thin films

R. Moubah, S. Colis, C. Ulhaq-Bouillet, M. Drillon and A. Dinia, J. Mater. Chem., 2008, 18, 5543 DOI: 10.1039/B812455H

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