Temperature evolution of self-organized stripe domains in ultrathin Fe films on MnAs/GaAs(001) (Articolo in rivista)

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  • Temperature evolution of self-organized stripe domains in ultrathin Fe films on MnAs/GaAs(001) (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.82.094423 (literal)
Alternative label
  • C. Helman; J. Milano; S. Tacchi; M. Madami; G. Carlotti; G. Gubbiotti; G. Alejandro; M. Marangolo; D. Demaille; V. H. Etgens; M. G. Pini (2010)
    Temperature evolution of self-organized stripe domains in ultrathin Fe films on MnAs/GaAs(001)
    in Physical review. B, Condensed matter and materials physics; American Physical Society (APS), College Pk (Stati Uniti d'America)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • C. Helman; J. Milano; S. Tacchi; M. Madami; G. Carlotti; G. Gubbiotti; G. Alejandro; M. Marangolo; D. Demaille; V. H. Etgens; M. G. Pini (literal)
Pagina inizio
  • 094423 (literal)
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  • http://link.aps.org/doi/10.1103/PhysRevB.82.094423 (literal)
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  • 82 (literal)
Rivista
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  • American Physical Society. (literal)
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  • 9 (literal)
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  • 9 (literal)
Note
  • ISI Web of Science (WOS) (literal)
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  • 1) CNEA, Centro Atómico Constituyentes, Avenida General Paz 1499, San Martín, Argentina 2) Laboratorio Internacional Franco-Argentino en Nanociencias (LIFAN) 3) CNEA, Centro Atómico Bariloche, San Carlos de Bariloche, R8402AGP Río Negro, Argentina 4) INSP, UPMC Paris 06, CNRS UMR 7588, 140 Rue de Lourmel, 75015 Paris, France 5) CNISM, Dipartimento di Fisica, Università di Perugia, Via A. Pascoli, I-06123 Perugia, Italy 6) Centro S3, CNR-Istituto di Nanoscienze, Via Campi 213A, I-41125 Modena, Italy 7) Istituto dei Sistemi Complessi, CNR, Via Madonna del Piano 10, Sesto Fiorentino, I-50019 Firenze, Italy (literal)
Titolo
  • Temperature evolution of self-organized stripe domains in ultrathin Fe films on MnAs/GaAs(001) (literal)
Abstract
  • A detailed investigation of the magnetic behavior of an ultrathin Fe film epitaxially grown onto MnAs/GaAs(001) is performed by means of both ferromagnetic resonance (FMR) and magneto-optical Kerr-effect (MOKE) experiments, as a function of temperature. When the MnAs underlayer is fully in the hexagonal ferromagnetic alpha phase (at low temperature) or in the orthorhombic non magnetic beta one (at high temperature), the magnetic behavior of the Fe film is found to be nearly the same and independent of the substrate. In contrast, at intermediate temperatures, when the MnAs underlayer presents a self-organized phase consisting of alpha-MnAs and beta-MnAs striped domains, the Fe film is strongly influenced by the dipolar (stray) fields arising from the substrate. As a consequence, the Fe film breaks in two distinct families of striped domains. Theoretical analysis of the FMR data in the whole investigated temperature range is performed using a free-energy density model which provides an accurate determination of the temperature-dependent magnetic parameters. Furthermore, the mechanism of magnetization reversal has been analyzed as a function of temperature by MOKE. The evolution of the magnetization curves can be satisfactory interpreted starting from the main achievements of the theoretical analysis of FMR data. (literal)
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