Spin transport in epitaxial magnetic manganite/ruthenate heterostructures with an LaMnO{sub 3} layer

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Journal of Experimental and Theoretical Physics

DOI:https://doi.org/10.1134/S1063776114100161· OSTI ID:22472442

Ovsyannikov, G. A.; Shadrin, A. V. ^[1]; Khaidukov, Yu. N.; Mustafa, L. ^[2]

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1. Russian Academy of Sciences, Kotel’nikov Institute of Radio Engineering and Electronics (Russian Federation)
2. Max-Plank Institute for Solid State Research (Germany)

Epitaxial La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/LaMnO{sub 3}/SrRuO{sub 3} (LSMO/LMO/SRO) heterostructures with an LMO layer 0–35 nm thick are grown by laser ablation on an NdGaO{sub 3} substrate at a high temperature. X-ray diffraction and transmission electron microscopy demonstrate sharp interfaces and epitaxial growth of the LSMO and SRO layers in the heterostructures at an LMO layer thickness of 0–35 nm. SQUID measurements of the magnetic moment of the heterostructures with an LMO layer and the data obtained with reflectometry of polarized neutrons show that the manganite LMO layer is a ferromagnet at a temperature below 150 K and strongly affects the magnetic moment of the heterostructures at low temperatures. The magnetoresistance of the mesostructure created from the heterostructure using lithography and ion etching decreases with increasing LMO layer thickness and weakly depends on the direction of an applied magnetic field. If the LMP layer is absent, a negative magnetoresistance is detected; it is likely to be caused by a negative magnetization of the SRO layer.

• OSTI ID: 22472442
• Journal Information: Journal of Experimental and Theoretical Physics, Vol. 119, Issue 4; Other Information: Copyright (c) 2014 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7761
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABLATION
EPITAXY
FERROMAGNETIC MATERIALS
HETEROJUNCTIONS
INTERFACES
LANTHANUM COMPOUNDS
LAYERS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIZATION
MAGNETORESISTANCE
MANGANATES
RUTHENIUM OXIDES
SPIN
SQUID DEVICES
STRONTIUM OXIDES
SUBSTRATES
TEMPERATURE DEPENDENCE
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION