Tunneling magnetoresistance of hydrothermally sintered La.sub.1-x./sub.Sr.sub.x./sub.MnO.sub.3./sub.- silica nanocomposites

0519369 - FZÚ 2020 RIV NL eng J - Článek v odborném periodiku
Kaman, Ondřej - Jirák, Zdeněk - Hejtmánek, Jiří - Ndayishimiye, A. - Prakasam, M. - Goglio, G.
Tunneling magnetoresistance of hydrothermally sintered La_1-xSr_xMnO₃- silica nanocomposites.
Journal of Magnetism and Magnetic Materials. Roč. 479, Jun (2019), s. 135-143. ISSN 0304-8853. E-ISSN 1873-4766
Grant CEP: GA ČR GA15-10088S
Institucionální podpora: RVO:68378271
Klíčová slova: metallic oxides * Perovskite manganite * tunneling magnetoresistance * hydrothermal sintering
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.717, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jmmm.2019.01.114

The study deals with tunneling magnetoresistance in a series of composite systems of so-called 0–3 connectivity, in which highly conducting manganite nanoparticles of ferromagnetic groundstate (0-dim objects) are embedded in the (3-dim) insulating matrix of silica. The sample fabrication included the sol-gel preparation of La1-xSrxMnO3particles of the x = 0.35 composition and 25 nm mean crystallite size, their coating by silica of controlled thicknesses in the 1–5 nm range, and subsequent consolidation by hydrothermal sintering at 300 °C. Temperature dependent electric resistivities of the materials were measured in magnetic fields of 0 and 40 kOe down to 5 K, and field-dependent isothermal curves were taken by sweeping magnetic field up to 140 kOe.
Trvalý link: http://hdl.handle.net/11104/0304363