@article{mal_nori_jin_narayan_nellutla_smirnov_prater_2010, title={Reversible room temperature ferromagnetism in undoped zinc oxide: Correlation between defects and physical properties}, volume={108}, number={7}, journal={Journal of Applied Physics}, author={Mal, S. and Nori, S. and Jin, C. M. and Narayan, J. and Nellutla, S. and Smirnov, A. I. and Prater, J. T.}, year={2010} }
 @article{ramachandran_prater_sudhakar_kumar_narayan_2008, title={Magnetic properties of epitaxial oxide heterostructures}, volume={145}, ISSN={["1879-2766"]}, DOI={10.1016/j.ssc.2007.10.005}, abstractNote={Diluted Magnetic Semiconductors (DMS) are of great interest as injection sources for spin-polarized currents into semiconductors. Epitaxial devices have been synthesized with an intermediate spacer layer of the same semiconductor (zinc oxide, ZnO) used to produce the DMS material (ZnCoO) ensuring a homoepitaxial junction to help reduce the interface states and conduction mismatch. We observe a large magnetoresistance of about 32% in the devices at low temperatures. The present work suggests that spin polarized transport could be achieved with DMS materials acting as the source of injected spins into a non-magnetic host.}, number={1-2}, journal={SOLID STATE COMMUNICATIONS}, author={Ramachandran, S. and Prater, J. T. and Sudhakar, N. and Kumar, D. and Narayan, J.}, year={2008}, month={Jan}, pages={18–22} }
 @article{sudhakar_rajeev_tiwari_narayan_2007, title={Room temperature ferromagnetism and magnetotransport properties of the layered manganite system La1.2Ba1.8Mn2-xRuxO7 (0 <= x <= 1-0)}, volume={142}, ISSN={["1879-2766"]}, DOI={10.1016/j.ssc.2007.03.041}, abstractNote={The dc magnetization and ac susceptibility measurements on two dimensional layered manganite La1.2Ba1.8Mn2O7 samples reveal the occurrence of ferromagnetism above room temperature with ferromagnetic (FM) to paramagnetic (PM) transitions at 338 K. The bifurcation temperatures shown by the zero-field cooled (ZFC) and field cooled (FC) dc magnetization curves at high temperatures shift towards lower temperatures as the applied field is increased from 100 to 2500 Oe. The data are suggestive of a large magnetic anisotropy due to the strong competing ferromagnetic and antiferromagnetic interactions resulting in a spin-glass-like state. Ru doping is found to enhance the ferromagnetism and metallicity of the system in a remarkable way. The magnetoresistance (MR) values obtained are very high and about 40% even at 260 K for the undoped sample.}, number={9}, journal={SOLID STATE COMMUNICATIONS}, author={Sudhakar, N. and Rajeev, K. P. and Tiwari, A. and Narayan, J.}, year={2007}, month={Jun}, pages={519–524} }
 @article{sudhakar_ningthoujam_rajeev_gajbhiye_narayan_2007, title={Structural, magnetic, and electron transport studies on nanocrystalline layered manganite La1.2Ba1.8Mn2O7 system}, volume={7}, ISSN={["1533-4899"]}, DOI={10.1166/jnn.2007.405}, abstractNote={The structure property relationship for Ru doped La1.2Ba1.8Mn2-RuxO7 system has been studied systematically. The system crystallizes in the single-phase tetragonal structure with space group of 14/mmm. The unit cell volume is found to increase with Ru doping. The sheet type microstructure could be seen in this system, which is important for anisotropic nature of layered structure. The crystallite size is found to be 25 nm indicating nanocrystalline nature of the system. Ferromagnetic to paramagnetic (Tc) transition above the room temperature is observed in all except the highest doped Ru (x = 1.0) where the Tc is 254 K using a.c. susceptibility measurement. The large values of magnetoresistance for the x = 0.0 sample at 10 K is found to be 57% and 64% at applied fields of 5 and 10 T, respectively.}, number={3}, journal={JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY}, author={Sudhakar, N. and Ningthoujam, R. S. and Rajeev, K. P. and Gajbhiye, N. S. and Narayan, J.}, year={2007}, month={Mar}, pages={965–969} }
 @article{tiwari_bhosle_ramachandran_sudhakar_narayan_budak_gupta_2006, title={Ferromagnetism in Co doped CeO2: Observation of a giant magnetic moment with a high Curie temperature}, volume={88}, number={14}, journal={Applied Physics Letters}, author={Tiwari, A. and Bhosle, V. M. and Ramachandran, S. and Sudhakar, N. and Narayan, J. and Budak, S. and Gupta, A.}, year={2006} }