Magnetic Resonance Studies of Half-Metallic Epitaxial CrO2 Thin Films Grown on Differently Oriented TiO2 Substrates

• Published in: Journal of superconductivity and novel magnetism Vol. 25; no. 8; pp. 2647 - 2651
• Main Authors: Intepe, A., Kazan, S., Chetry, K. B., Mikailzade, F., Yilgin, R., Aktaş, B., Ozdemir, M., Gupta, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Boston Springer US 01.12.2012; Springer
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance; Magnetic anisotropy; Magnetic Materials; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Magnetically ordered materials: other intrinsic properties; Magnetism; Original Paper; Physics; Physics and Astronomy; Strongly Correlated Systems; Superconductivity; Ferromagnetic resonance; Oxides; Half-metals; Magnetic anisotropy; Thin films; CVD; Monocrystals; Strains; Chromium oxide; Magnetic resonance; Semimetals; Layer thickness
• ISSN: 1557-1939; 1557-1947
• DOI: 10.1007/s10948-011-1236-z

The results of structural and ferromagnetic resonance (FMR) investigations of epitaxial half- metallic chromium dioxide (CrO 2 ) thin films of thicknesses between 58 nm and 540 nm grown by chemical vapor deposition (CVD) on (100) and (110)-oriented TiO 2 single crystal substrates are presented. The angular dependences of the FMR spectra in different experimental geometries were obtained. Effective magnetic anisotropies of epitaxially grown CrO 2 films of different thicknesses on strain and strain-free surfaces of TiO 2 substrates were estimated. The results indicate that the magnetic behavior of the CrO 2 films results from a competition between the magnetocrystalline and strain anisotropies. It has been revealed that the strain anisotropy dominates in the films grown onto (100)-oriented TiO 2 substrates. On the contrary, the films grown onto (110)-oriented substrates demonstrate strain-free magnetic anisotropy behavior.