Tunneling magnetoresistance in nanogranular La.sub.1-x./sub.Sr.sub.x./sub.MnO.sub.3./sub. (x∼0.5)

0485370 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Hejtmánek, Jiří - Jirák, Zdeněk - Kaman, Ondřej - Vratislav, S.
Tunneling magnetoresistance in nanogranular La_1-xSr_xMnO₃ (x∼0.5).
AIP Advances. Roč. 7, č. 5 (2017), s. 1-6, č. článku 055818. E-ISSN 2158-3226
Grant CEP: GA ČR GA15-10088S
Institucionální podpora: RVO:68378271
Klíčová slova: magnetic nanoparticles * perovskite manganites * magnetotransport phenomena
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.653, rok: 2017

Electric transport and magnetic studies were performed on the La1-xSrxMnO3 (x=0.45-0.55) perovskite manganites. The main focus was given to the nanogranular ceramics of average x=0.47 composition, compacted by spark plasma sintering of molten salt synthesized nanoparticles. This sample can be viewed as a two-phase composite where FM manganite granules are embedded in AFM manganite matrix. The magnetoconductance data observed on this sample reveal a coexistence of distinct low- and high-field contributions, related to the field-induced alignment of ferromagnetic (FM) granules and the spin canting in antiferromagnetic (AFM) matrix, respectively.
Trvalý link: http://hdl.handle.net/11104/0280415