Magnetotransport in epitaxial thin films of the magnetic perovskite Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3}

Journal Article · Sat Feb 01 04:00:00 EST 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.3699· OSTI ID:450386

Wagner, P H; Metlushko, V; Trappeniers, L ^[1]; Vantomme, A ^[2]; Vanacken, J ^[1]; Kido, G ^[3]; Moshchalkov, V V; Bruynseraede, Y ^[1]

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1. Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, 3001 Leuven (Belgium)
2. Instituut voor Kern-en Stralingsfysica, Katholieke Universiteit Leuven, Celestijnenlaan 200 D, 3001 Leuven (Belgium)
3. Tsukuba Magnet Laboratories, National Research Institute for Metals, Sengen 1-2-1, Tsukuba Science City, Ibaraki 305 (Japan)

Thin, {rvec c}-axis oriented films of the magnetic perovskite Pr{sub 0.5}Sr{sub 0.5}MnO{sub 3} were prepared by dc-magnetron sputtering, structurally characterized by x-ray diffraction and their physical properties investigated by magnetization and electrical transport measurements. Ferromagnetic ordering appears in zero field at 263 K, followed by a second transition into an antiferromagnetic state at 160 K. The zero-field resistivity has a semiconducting behavior above the Curie and below the N{acute e}el temperature and is analyzed in the framework of Mott{close_quote}s variable range hopping concept. Quasimetallic behavior is observed within the ferromagnetic state, whose temperature range can be extended by applying an external magnetic field. The negative magnetoresistance effect increases systematically with decreasing temperature and reaches a value of 700{percent} at 1.5 K in a field of 12 T. In the ferro- and antiferromagnetic phases, the field induced resistivity decrease scales with the Brillouin function, suggesting the existence of magnetically polarized regions with a total magnetic moment which is reduced upon entering the antiferromagnetic state. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 450386
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 6 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MAGNETORESISTANCE
MANGANESE OXIDES
PHASE TRANSFORMATIONS
PRASEODYMIUM OXIDES
STRONTIUM OXIDES
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
THIN FILMS
magnetic epitaxial layers