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1. B. K. Das, A. C. Rastogi, B. R. Awasthi, H. P. Gupta, S. Dhara, and V. N. Moorthy: “An Improved Process for Preparation of High Coercivity Yttrium Iron Garnet Thin Films Useful for Magnetic and Magneto Optic Recording”; Indian Patent 199570 (2006). Among best five in 2007.
2. B. K. Das, A. C. Rastogi, B. R. Awasthi, H. P. Gupta, S. Dhara, and V. N. Moorthy: An improved process for the preparation of multiple bilayers of high coercivity yttrium-iron garnet thin films useful, Indian Patent Application no. 296/DEL/2000.