Structural and magnetic properties of La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin films integrated onto Si(100) substrates with SrTiO{sub 3} as buffer layer

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3565422· OSTI ID:21560121

Belmeguenai, M; Mercone, S; Moch, P ^[1]; Adamo, C; Schlom, D G ^[2]; Monod, P ^[3]

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1. LSPM, UPR 3407 CNRS, Universite Paris 13, Av. J.-B. Clement, 93430 Villetaneuse (France)
2. Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853-1501 (United States)
3. LPEM, UPR A0005 CNRS, ESPCI, 10 Rue Vauquelin, F-75231 Paris cedex 5 (France)

La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) thin films with a thickness d of 10, 20, 60, and 100 nm were grown on 20-nm-thick SrTiO{sub 3}-buffered (100) silicon substrates by a reactive molecular beam epitaxy. For all samples, x-ray diffraction (XRD) revealed an excellent epitaxy with in-plane cubic [100] and [010] axes of LSMO. The XRD measured values of the out-of-plane lattice parameter suggest that the strain state does not vary significantly from sample to sample. A super conducting quantum interference device reveals that the room temperature magnetization at saturation increases with d and nearly reaches the bulk value for d = 100 nm; the Curie temperature ranges in the 320-350 K interval, to compare to 360 K in the bulk. Ferromagnetic resonance (FMR) in cavity (at 9.5 GHz) and microstrip FMR used to investigate the dynamic magnetic properties, revealed a fourfold anisotropy showing its easy axes along the [110] and [110] directions. In the thickest samples (d > 20 nm), the FMR spectra present two distinct resonant modes. This splitting is presumably due to the simultaneous presence of two different magnetic phases.

• OSTI ID: 21560121
• Journal Information: Journal of Applied Physics, Vol. 109, Issue 7; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: DOI: 10.1063/1.3565422; (c) 2011 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
CURIE POINT
FERROMAGNETIC RESONANCE
INTERFERENCE
LANTHANUM COMPOUNDS
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANATES
MOLECULAR BEAM EPITAXY
NANOSTRUCTURES
SATURATION
SILICON
SPECTRA
STRONTIUM TITANATES
SUBSTRATES
THIN FILMS
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
COHERENT SCATTERING
CRYSTAL GROWTH METHODS
DIFFRACTION
ELEMENTS
EPITAXY
FILMS
MAGNETIC RESONANCE
MANGANESE COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
RESONANCE
SCATTERING
SEMIMETALS
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE