Thermally activated magnetization reversal in bulk BiFe0.5Mn0.5O3 (Articolo in rivista)

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Label
  • Thermally activated magnetization reversal in bulk BiFe0.5Mn0.5O3 (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.88.014431 (literal)
Alternative label
  • D. Delmonte (1); F. Mezzadri (2); C. Pernechele (1); G. Calestani (2,3); G. Spina (4); M. Lantieri (5); M. Solzi (1); R. Cabassi (2); F. Bolzoni (2); A. Migliori (6); C. Ritter (7); E. Gilioli (2) (2013)
    Thermally activated magnetization reversal in bulk BiFe0.5Mn0.5O3
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Delmonte (1); F. Mezzadri (2); C. Pernechele (1); G. Calestani (2,3); G. Spina (4); M. Lantieri (5); M. Solzi (1); R. Cabassi (2); F. Bolzoni (2); A. Migliori (6); C. Ritter (7); E. Gilioli (2) (literal)
Pagina inizio
  • 014431 (literal)
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  • http://link.aps.org/doi/10.1103/PhysRevB.88.014431 (literal)
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  • 88 (literal)
Rivista
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  • 11 (literal)
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  • 1 (literal)
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  • ISI Web of Science (WOS) (literal)
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  • (1) Dipartimento di Fisica, Università di Parma, Parco Area delle Scienze 7/A, 43124 Parma, Italy (2) IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy (3) Dipartimento di Chimica, GIAF Università di Parma, Parco Area delle Scienze 17/A 43124 Parma, Italy (4) Dipartimento di Fisica, Università di Firenze, via Sansone 1, 50019 Sesto Fiorentino (FI), Italy (5) Istituto Sistemi Complessi-CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino (FI), Italy (6) IMM-CNR, via Gobetti 101, 40129 Bologna, Italy (7) Institute Laue-Langevin, Boîte Postale 156, F-38042, Grenoble, France (literal)
Titolo
  • Thermally activated magnetization reversal in bulk BiFe0.5Mn0.5O3 (literal)
Abstract
  • We report on the synthesis and characterization of BiFe0.5Mn0.5O3, a potential type-I multiferroic compound displaying temperature-induced magnetization reversal. Bulk samples were obtained by means of solid-state reaction carried out under the application of hydrostatic pressure of 6 GPa at 1100 °C. The crystal structure is a highly distorted perovskite with no cation order on the B site, where, besides a complex scheme of tilt and rotations of the TM-O6 octahedra, large off-centering of the bismuth ions is detected. Below T1 = 420 K the compound undergoes a first weak ferromagnetic transition related to the ordering of iron-rich clusters. At lower temperatures (just below RT) a complex thermally activated mechanism induces at first an enhancement of the magnetization at T2 = 288 K, then a spontaneous reversal giving rise to a negative response. The complementary use of powder neutron diffraction, superconducting quantum interference device magnetometry, and Mössbauer spectroscopy allowed us to propose as a possible interpretation of the overall magnetic behavior the presence of an uncompensated competitive coupling between nonequivalent clusters of weakly ferromagnetic interactions characterized by different critical temperatures and resultant magnetizations. (literal)
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