Irradiation induced ferromagnetism at room temperature in TiO{sub 2} thin films: X-ray magnetic circular dichroism characterizations

Journal Article · Mon May 09 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3592250· OSTI ID:21518433

Thakur, Hardeep; Sharma, K K ^[1]; Thakur, P; Brookes, N B ^[2]; Kumar, Ravi ^[3]; Singh, A P; Kumar, Yogesh ^[4]; Gautam, S; Chae, K H ^[5]

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1. Department of Physics, National Institute of Technology, Hamirpur 177005 (India)
2. European Synchrotron Radiation Facility (ESRF), BP 220, F-38043 Grenoble Cedex (France)
3. Center for Material Science and Engineering, National Institute of Technology, Hamirpur 177005 (India)
4. Material Science Division, Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067 (India)
5. Nano Analysis Center, Korea Institute of Science and Technology (KIST), Seoul 136-791 (Korea, Republic of)

We report on the room temperature ferromagnetism in the swift heavy ion (SHI) irradiated TiO{sub 2} thin films by x-ray absorption spectroscopy (XAS) and x-ray magnetic circular dichroism (XMCD) experiments at the O K and Ti L{sub 3,2} absorption edges. The XAS/XMCD measurements provide direct evidence of magnetic polarization of the O 2p and Ti 3d orbitals. The unquenched orbital magnetic moment within the O 2p shell is ferromagnetically coupled to the neighboring Ti moments, which illustrates the intense hybridization of the O 2p and Ti 3d orbitals induced by SHI irradiation.

• OSTI ID: 21518433
• Journal Information: Applied Physics Letters, Vol. 98, Issue 19; Other Information: DOI: 10.1063/1.3592250; (c) 2011 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
ABSORPTION SPECTROSCOPY
ELECTRONIC STRUCTURE
FERROMAGNETIC MATERIALS
FERROMAGNETISM
HEAVY IONS
ION BEAMS
IRRADIATION
MAGNETIC CIRCULAR DICHROISM
MAGNETIC MOMENTS
PHYSICAL RADIATION EFFECTS
POLARIZATION
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
TITANIUM OXIDES
X RADIATION
X-RAY SPECTROSCOPY
BEAMS
CHALCOGENIDES
CHARGED PARTICLES
DICHROISM
ELECTROMAGNETIC RADIATION
FILMS
IONIZING RADIATIONS
IONS
MAGNETIC MATERIALS
MAGNETISM
MATERIALS
OXIDES
OXYGEN COMPOUNDS
RADIATION EFFECTS
RADIATIONS
SORPTION
SPECTROSCOPY
TEMPERATURE RANGE
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS