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Appl. Phys. Lett. 97, 094102 (2010); http://dx.doi.org/10.1063/1.3485055 (3 pages)

Left handed material based on amorphous ferromagnetic microwires tunable by dc current

H. García-Miquel, J. Carbonell, and J. Sánchez-Dehesa

Grupo de Fenómenos Ondulatorios, Departamento de Ingeniería Electrónica, Universidad Politécnica de Valencia, Camino de Vera, s/n, E-46022 Valencia, Spain

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(Received 25 June 2010; accepted 11 August 2010; published online 2 September 2010)

Tuning of the transmission characteristics of amorphous ferromagnetic microwires through a dc current is demonstrated. These structures are studied in the frequency region where they present double negative behavior. It is found that their frequency response shifts with small dc currents circulating along the wires. It is observed that the dc current tends to compensate and even cancels the resonant peak associated to the static magnetic field applied along the wire axis. The phenomenon behind these findings is discussed in terms of the torque exerted by the field created by the current on the plane perpendicular to the wire axis.

© 2010 American Institute of Physics

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KEYWORDS and PACS

PACS

  • 78.20.Jq

    Electro-optical effects

  • 75.50.Kj

    Amorphous and quasicrystalline magnetic materials

  • 42.70.Nq

    Other nonlinear optical materials; photorefractive and semiconductor materials

  • 75.50.Bb

    Fe and its alloys

ARTICLE DATA

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

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