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Dive into the research topics where R. P. Borges is active.

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Featured researches published by R. P. Borges.


Journal of Physics: Condensed Matter | 2007

Magnetism in Ar-implanted ZnO

R. P. Borges; R.C. da Silva; Sérgio Magalhães; M.M. Cruz; M. Godinho

ZnO single crystals were implanted with Ar ions with an energy of 100 keV and different fluences. Ferromagnetic behaviour is observed at room temperature after implantation. This behaviour is suppressed after consecutive annealings at 400 and 500 °C. Although trace transition metal impurities have been identified in the virgin samples, it is shown that they cannot account for the observed magnetic behaviour that is assigned to the presence of implantation-induced lattice defects.


Journal of Applied Physics | 2012

Electronic structure, optical and magnetic properties of Co2FeGe Heusler alloy films

N. V. Uvarov; Y. V. Kudryavtsev; Anatolii F. Kravets; A.Ya. Vovk; R. P. Borges; M. Godinho; Vladislav Korenivski

Optical properties of ferromagnetic half-metallic full-Heusler Co


Photochemistry and Photobiology | 1998

Photophysical properties and photobiological activity of the furanochromones visnagin and khellin.

Marta L. Borges; Loredana Latterini; Fausto Elisei; Palmira Ferreira da Silva; R. P. Borges; Ralph S. Becker; António L. Maçanita

_{2}


Journal of Physics: Condensed Matter | 2008

Ab-initio calculations of the Ruddlesden?Popper phases CaMnO3, CaO(CaMnO3) and CaO(CaMnO3)2

Claudia Cardoso; R. P. Borges; T Gasche; M. Godinho

FeGe alloy are investigated experimentally and theoretically. Co


Journal of Applied Physics | 2013

Self-doping and the role of oxygen vacancies in the magnetic properties of cubic BaFeO3−δ

B. Ribeiro; M. Godinho; C. Cardoso; R. P. Borges; T. P. Gasche

_{2}


Journal of Physics: Condensed Matter | 2010

Nitrogen and argon doped zinc oxide.

C. Silva; A.R.G. Costa; M.M. Cruz; R.C. da Silva; R. P. Borges; L.C. Alves; M. Godinho

FeGe thin films were obtained by DC magnetron sputtering and show the saturation magnetization at


Journal of Magnetism and Magnetic Materials | 2003

Spin injection efficiency in spin electronic devices

J. F. Gregg; R. P. Borges; E. Jouguelet; C.L. Dennis; I Petej; S. M. Thompson; K. Ounadjela

T


Journal of Applied Physics | 2012

Structural and magnetic properties of thin films of BaFeO3-δ deposited by pulsed injection metal-organic chemical vapor deposition

B. Ribeiro; R. P. Borges; R.C. da Silva; N. Franco; Pedro Ferreira; E. Alves; Bruno Berini; A. Fouchet; N. Keller; M. Godinho

=10 K of


Journal of Physics: Condensed Matter | 2013

Rotatable magnetic anisotropy in Si/SiO2/(Co2Fe)xGe1?x Heusler alloy films

S. M. Ryabchenko; V. M. Kalita; M. M. Kulik; A. F. Lozenko; V. V. Nevdacha; A. N. Pogorily; Anatolii F. Kravets; D. Y. Podyalovskiy; A. Ya. Vovk; R. P. Borges; M. Godinho; Vladislav Korenivski

m\approx


Chemistry of Materials | 2005

Electron doping of Ca4Mn3O10 induced by vanadium substitution

M.D. Carvalho; R. P. Borges; Ana V. Girão; M.M. Cruz; M. E. Melo Jorge; G. Bonfait; and P. Dluzewski; M. Godinho

5.6

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R.C. da Silva

Instituto Superior Técnico

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A.P. Gonçalves

Instituto Superior Técnico

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C. Silva

University of Lisbon

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G. Bonfait

Universidade Nova de Lisboa

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Sérgio Magalhães

Universidade Federal Rural do Rio de Janeiro

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