Gautam, S. Thakur, P. Bazylewski, R. Bauer, R. Singh, A. P. Kim, J. Y. Subramanian, M. Jayavel, R. Asokan, K. Chae, K. H. Chang, G. S. 2024-01-20T12:03:48Z 2024-01-20T12:03:48Z 2021-09-05 2013-06-15 0254-0584 https://pubs.kist.re.kr/handle/201004/127961 Dilute magnetic semiconductors are widely studied due to their potential applications in spin-resolved electronics. We report the direct evidences of intrinsic ferromagnetism in the primarily ferromagnetic ZnO:Co thin films using near-edge X-ray absorption fine structure (NEXAFS) and soft X-ray magnetic circular dichroism (XMCD). The single phase Zn1-xCoxO thin films with nominal compositions (0.00 <= x <= 0.15) were synthesized by a spray pyrolysis technique, which exhibit room temperature ferromagnetism as revealed by alternating gradient force magnetometer (AGFM) measurements. The spectroscopic measurements indicate that most of Co dopants have substituted for Zn sites in ZnO matrix and they are present in divalent Co2+ (d(7)) state with tetrahedral symmetry according to the atomic multiplet calculations. The 0 Is NEXAFS spectra suggest strong hybridization between O 2p and Co 3d electrons within ZnO matrix. The Co 2p XMCD measurements rule out the magnetism due to the presence of Co clusters, and show that Co-O-Co bonding provides localized magnetic moments leading to ferromagnetism. (C) 2013 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA X-RAY-ABSORPTION DOPED ZNO FILMS ELECTRONIC-STRUCTURE ROOM-TEMPERATURE MAGNETIC SEMICONDUCTORS MN DESIGN SPINTRONICS OXIDE Spectroscopic study of Zn1-xCoxO thin films showing intrinsic ferromagnetism Article 10.1016/j.matchemphys.2013.03.011 1 MATERIALS CHEMISTRY AND PHYSICS, v.140, no.1, pp.130 - 134 MATERIALS CHEMISTRY AND PHYSICS 140 1 130 134 scie scopus 000319789500021 2-s2.0-84877577674 Materials Science, Multidisciplinary Materials Science Article X-RAY-ABSORPTION DOPED ZNO FILMS ELECTRONIC-STRUCTURE ROOM-TEMPERATURE MAGNETIC SEMICONDUCTORS MN DESIGN SPINTRONICS OXIDE Magnetic materials Ab initio calculations Magnetometer Magnetic X-ray techniques Electronic structure Magnetic properties