Native defect induced charge and ferromagnetic spin ordering and coexisting electronic phases in CoO epitaxial thin film

Journal Article · Mon Dec 07 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4937009· OSTI ID:22486194

Loukya, B.

We report on the observation of Co vacancy (V{sub Co}) induced charge ordering and ferromagnetism in CoO epitaxial thin film. The ordering is associated with the coexistence of commensurate, incommensurate, and discommensurate electronic phases. Density functional theory calculation indicates the origin of ordering in Co atoms undergoing high spin to low spin transition immediately surrounding the V{sub Co(16.6 at. %)}. Electron magnetic chiral dichroism experiment confirms the ferromagnetic signal at uncompensated Co spins. Such a native defects induced coexistence of different electronic phases at room temperature in a simple compound CoO is unique and adds to the richness of the field with the possibility of practical device application.

• OSTI ID: 22486194
• Journal Information: Applied Physics Letters, Vol. 107, Issue 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
CHIRALITY
COBALT OXIDES
DENSITY FUNCTIONAL METHOD
DICHROISM
EPITAXY
FERROMAGNETISM
SPIN
TEMPERATURE RANGE 0273-0400 K
THIN FILMS
VACANCIES