TITLE

Interfacial structure and chemistry of epitaxial CoFe2O4 thin films on SrTiO3 and MgO substrates

AUTHOR(S)
Xie, S.; Cheng, J.; Wessels, B. W.; Dravid, V. P.
PUB. DATE
November 2008
SOURCE
Applied Physics Letters;11/3/2008, Vol. 93 Issue 18, p181901
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Interfacial structure and chemistry of epitaxial CoFe2O4 thin films on (001)_SrTiO3 and (001)_MgO substrates were investigated using high-angle-annular-dark-field imaging combined with electron-energy-loss-spectra (EELSs) analyses at a subnanometer scale. The results show that CoFe2O4/SrTiO3 interface is semicoherent with requisite dislocation density to accommodate ∼7% lattice mismatch, while the small (∼0.3%) lattice mismatch renders CoFe2O4/MgO interface coherent. EELS indicates that Fe valence is nominally +3, with no measurable change across the interfaces. Structural characterization corroborates with observed lower saturation magnetization of CoFe2O4 on MgO, which is a consequence of tensile stress built up in the <100>-direction negative magnetostrictive CoFe2O4.
ACCESSION #
35279238

 

Related Articles

  • Nanogrowth twins and abnormal magnetic behavior in CoFe2O4 epitaxial thin films. Yan, Li; Wang, Yu; Li, Jiefang; Pyatakov, Alexander; Viehland, D. // Journal of Applied Physics;Dec2008, Vol. 104 Issue 12, p123910 

    Nanogrowth twins (GTs) have been observed in CoFe2O4 (CFO) epitaxial thin films deposited on (111) oriented SrTiO3 substrates by pulsed laser deposition. The GTs form during nucleation and growth and consist of CFO growth regions that have a mirror relationship with respect to each other. We...

  • Room temperature epitaxial stabilization of a tetragonal phase in ARuO3 (A=Ca and Sr) thin films. Vailionis, Arturas; Siemons, Wolter; Koster, Gertjan // Applied Physics Letters;8/4/2008, Vol. 93 Issue 5, p051909 

    We demonstrate that SrRuO3 and CaRuO3 thin films undergo a room temperature structural phase transition driven by the substrate imposed epitaxial biaxial strain. As tensile strain increases, ARuO3 (A=Ca and Sr) films transform from the orthorhombic phase which is usually observed in bulk SrRuO3...

  • Coercivity enhancement in L11 Co50-xCuxPt50 thin films. Yuan, Fu-Te; Sun, An-Cheng; Hsu, Jen-Hwa; Tan, C. S.; Kuo, P. C.; Liao, W. M.; Lee, H. Y. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07B714 

    This study investigates structural and magnetic properties of the (Co50-xCux)Pt50 films deposited on the MgO(111) substrate. Experimental results indicate that adding Cu significantly improves the alignment of L11[111] and decreases the structural defects of the epitaxial films. Additionally, a...

  • Epitaxial thin films of the multiferroic double perovskite Bi2FeCrO6 grown on (100)-oriented SrTiO3 substrates: Growth, characterization, and optimization. Nechache, Riad; Harnagea, Catalin; Carignan, Louis-Philippe; Gautreau, Olivier; Pintilie, Lucian; Singh, Mangala P.; Ménard, David; Fournier, Patrick; Alexe, Marin; Pignolet, Alain // Journal of Applied Physics;Mar2009, Vol. 105 Issue 6, p061621 

    The influence of the deposition pressure (PO2) and substrate temperature (TS) during the growth of Bi2FeCrO6 thin films grown by pulsed laser deposition has been investigated. It is found that the high volatility of Bi makes the deposition very difficult and that the growth of pure Bi2FeCrO6...

  • Study of epitaxial multiferroic BiFeO3 films. Kothari, Deepti; Reddy, V. Raghavendra; Gupta, Ajay // AIP Conference Proceedings;12/1/2010, Vol. 1313 Issue 1, p212 

    Multiferroic BiFeO3 epitaxial thin films are prepared using pulsed laser deposition method on single crystal SrTiO3 (001) substrates. The prepared films are characterized by [001] growth and the in-plane [lowercase_phi_synonym]-scans haven shown that the films are characterized by 'cube-on-cube'...

  • Strain Effect on the Electrical and Magnetic Properties of LaBaMnO Thin Films Grown by Metal-Organic Deposition. Daoudi, K.; Oueslati, M.; Tsuchiya, T.; Nakajima, T.; Kawaguchi, K. // Journal of Superconductivity & Novel Magnetism;Oct2010, Vol. 23 Issue 7, p1355 

    LaBaMnO thin films have been epitaxially grown by metal-organic deposition on SrTiO (STO) and LaAlO (LAO) single-crystal substrates. Temperature dependence of magnetization M( T) and resistivity ρ( T) are used to characterize the Curie temperature ( T) of the ferromagnetic transition. T is...

  • Epitaxial growth and magnetoelectric relaxor behavior in multiferroic 0.8Pb(Fe1/2Nb1/2)O3–0.2Pb(Mg1/2W1/2)O3 thin films. Wei Peng; Lemée, N.; Dellis, J.-L.; Shvartsman, V. V.; Borisov, P.; Kleemann, W.; Trontelj, Z.; Holc, J.; Kosec, M.; Blinc, R.; Karkut, M. G. // Applied Physics Letters;9/28/2009, Vol. 95 Issue 13, p132507 

    We present electric and magnetic properties of 0.8Pb(Fe1/2Nb1/2)O3–0.2Pb(Mg1/2W1/2)O3 films epitaxially grown on (001) SrTiO3 substrates using pulsed laser deposition. A narrow deposition window around 710 °C and 0.2 mbar has been identified to achieve epitaxial single-phase thin...

  • Strain-mediated magnetic and transport properties of epitaxial LuxFe3-xO4 films. Wang, P.; Jin, C.; Zheng, D. X.; Bai, H. L. // Journal of Applied Physics;2015, Vol. 118 Issue 13, p133901-1 

    Strain mediated structure, magnetic, and transport properties of spinel ferrites were investigated by growing epitaxial LuxFe3-xO4 (LFO, 0 ≤ x ≤ 0:26) films on SrTiO3 and MgO substrates with inplane compressive and tensile strains, respectively. The lattice parameter of LFO films...

  • Influence of symmetry mismatch on heteroepitaxial growth of perovskite thin films. Proffit, D. L.; Jang, H. W.; Lee, S.; Nelson, C. T.; Pan, X. Q.; Rzchowski, M. S.; Eom, C. B. // Applied Physics Letters;9/15/2008, Vol. 93 Issue 11, p111912 

    Epitaxial thin films of (110) orthorhombic CaRuO3 grown on orthorhombic (110) NdGaO3 and cubic (001) (LaAlO3)0.3–(Sr2AlTaO6)0.7 (LSAT) substrates serve as a model system isolating the influence of oxygen octahedron distortion on epitaxial growth of thin films. CaRuO3 grows as a coherent...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics