Magnetoconductivity of the La.sub.1-x./sub.Sr.sub.x./sub.MnO.sub.3./sub.@TiO.sub.2./sub. Nanocomposite

0483767 - FZÚ 2018 RIV US eng J - Journal Article
Koktan, Jakub - Goglio, G. - Hejtmánek, Jiří - Jirák, Zdeněk - Knížek, Karel - Kuličková, Jarmila - Maryško, Miroslav - Kaman, Ondřej
Magnetoconductivity of the La_1-xSr_xMnO₃@TiO₂ Nanocomposite.
IEEE Transactions on Magnetics. Roč. 53, č. 11 (2017), s. 1-6, č. článku 8109606. ISSN 0018-9464. E-ISSN 1941-0069
R&D Projects: GA ČR GA15-10088S
Institutional support: RVO:68378271
Keywords : nanoparticles * conductivity * magnetic cores * magnetic tunneling * temperature measurement * coatings
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.467, year: 2017

This paper deals with tunneling magnetoresistance in a composite system of the so-called 0-3 connectivity, in which ferromagnetic (FM) metallic nanoparticles La1-xSrxMnO3 (0-D objects) are embedded in the (3-D) insulating matrix of TiO2. The sample fabrication included the sol-gel preparation of manganite particles of the x = 0.35 composition and 25 nm mean crystallite size, their coating by TiO2, and compacting the products by spark plasma sintering (SPS). A comparative nanogranular sample was prepared by SPS of bare manganite particles. The resistivities of the composite and comparative samples are 100 000 and 100 times higher compared to those of bulk metallic La1-xSrxMnO3.

Permanent Link: http://hdl.handle.net/11104/0278965