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Transition-metal monoxide single crystal growth by the floating-zone technique
|Dharmalingam Prabhakaran 1, Andrew T. Boothroyd|
1. University of Oxford, Department of Physics, The Clarendon Laboratory, Parks Road, Oxford OX13PU, United Kingdom
Exciting phenomenon in physics such as high Tc superconductivity, Colossal magnetoresistance (CMR) and multiferroic have been discovered in many different families of compounds containing some magnetic elements such as Mn, Fe, Co and Ni. One way of understanding the basic mechanism of these complicated systems is to study the simple monoxides in detail. Neutron and X-ray scattering studies are particularly desirable to probe the spin and charge states and both need large size single crystals. However, growing a phase pure monoxide single crystal is quite a challenging task due to the mixed valency states.
The phase pure MnO, FeO, CoO and NiO have been obtained by annealing the powder in a reduced atmosphere. We have employed the floating-zone method to grow large size single crystals. Crack-free single crystals have been grown successfully. The purity of the material was confirmed both before and after the crystal growth process. We have studied the variation in the physical properties of the grown crystals. We will discuss the growth conditions, crystal quality and magnetic properties of the monoxide crystals.
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2. M. Massot, A. Oleaga, A. Salazar, D. Prabhakaran, M. Martin, P. Berthet and G. Dhalenne, Physical Review 77 (2008) 134438
Presentation: Poster at 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17, Topical Session 6, by Dharmalingam Prabhakaran
See On-line Journal of 17th International Conference on Crystal Growth and Epitaxy - ICCGE-17
Submitted: 2013-04-13 17:30 Revised: 2013-04-17 20:25