Magnetic properties of BaTiO{sub 3}/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin films integrated on Si(100)

Journal Article · Sun Dec 14 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4903322· OSTI ID:22402778

Prater, J. T. ^[1]; Fan, Wu; Narayan, J. ^[2]

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1. Materials Science Division, Army Research Office, Research Triangle Park, North Carolina 27709 (United States)
2. Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695 (United States)

Two-phase multiferroic heterostructures composed of room-temperature ferroelectric BaTiO{sub 3} (BTO) and ferromagnetic La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) epitaxial thin films were grown on technologically important substrate Si (100). Bilayers of BTO/LSMO thin films display ferromagnetic Curie transition temperatures of ∼350 K, close to the bulk value, which are independent of BTO films thickness in the range of 25–100 nm. Discontinuous magnetization jumps associated with BTO structural transitions were suppressed in M(T) curves, probably due to substrate clamping effect. Interestingly, at cryogenic temperatures, the BTO/LSMO structure with BTO layer thickness of 100 nm shows almost 2-fold higher magnetic coercive field, 3-fold reduction in saturation magnetization, and improved squareness compared to the sample without BTO. We believe that the strong in-plane spin pinning of the ferromagnetic layer induced by BTO layer at BTO/LSMO interface could cause such changes in magnetic properties. This work forms a significant step forward in the integration of two-phase multiferroic heterostructures for CMOS applications.

• OSTI ID: 22402778
• Journal Information: Journal of Applied Physics, Vol. 116, Issue 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIAGRAMS
EPITAXY
FERROELECTRIC MATERIALS
INTERFACES
LAYERS
MAGNETIC PROPERTIES
MAGNETIZATION
SATURATION
SUBSTRATES
TEMPERATURE RANGE 0273-0400 K
THICKNESS
THIN FILMS
TITANATES
TRANSITION TEMPERATURE