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.

References: 

1.     Z.Yamani,  W.J.L. Buyers, R.A. Cowley and D. Prabhakaran  Canadian journal of Physics 88 (2010) 729.

2.     M. Massot, A. Oleaga, A. Salazar, D. Prabhakaran, M. Martin, P. Berthet and G. Dhalenne,  Physical Review  77  (2008)   134438   

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1. Bulk Single crystal growth and magnetic studies of La_2-xSr_xCoO₄