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  • Küçük Resim
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    Ferromagnetic resonance in double perovskite epitaxial thin films of La2NiMnO6 on SrTiO3 and NdGaO3 substrates
    (Amer Inst Physics, 2010) Kazan, Sinan; Mikailzade, F.A.; Özdemir, Mustafa; Aktaş, Bekir; Rameev, Bulat; İntepe, A.; Gupta, Amit
    Ferromagnetic resonance (FMR) studies of epitaxial La2NiMnO6 (LNMO) thin films on (100) oriented SrTiO3 and (110) oriented NdGaO3 substrates at room temperature are presented. Observation of FMR spectra above the Curie temperature of this compound confirms the presence of magnetic ordering in LNMO thin films at room temperature. Best fitting of FMR spectra has been made on the assumption of the coexistence of two magnetic phases with different easy and hard axis periodicities in the film plane of LNMO. The spectra of the films on various substrates are characterized by different in-plane and out-of-plane symmetries, which indicates the existence of different epitaxial growth on the substrates with different crystal symmetries and orientations. (C) 2010 American Institute of Physics. [doi:10.1063/1.3481678]
  • Küçük Resim
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    Magnetic Resonance Studies of Half-Metallic Epitaxial CrO2 Thin Films Grown on Differently Oriented TiO2 Substrates
    (Springer, 2012) İntepe, A.; Kazan, Sinan; Chetry, Krishna B.; Mikailzade, F.; Yılgın, Resul; Aktaş, Bekir; Gupta, Amit
    The results of structural and ferromagnetic resonance (FMR) investigations of epitaxial half- metallic chromium dioxide (CrO2) thin films of thicknesses between 58 nm and 540 nm grown by chemical vapor deposition (CVD) on (100) and (110)-oriented TiO2 single crystal substrates are presented. The angular dependences of the FMR spectra in different experimental geometries were obtained. Effective magnetic anisotropies of epitaxially grown CrO2 films of different thicknesses on strain and strain-free surfaces of TiO2 substrates were estimated. The results indicate that the magnetic behavior of the CrO2 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 TiO2 substrates. On the contrary, the films grown onto (110)-oriented substrates demonstrate strain-free magnetic anisotropy behavior.