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Zeitschriftenartikel:

S. Engelbrecht, A. M. Shuvaev, Y. Luo, V. Moshnyaga, A. Pimenov:
"Negative refraction in natural ferromagnetic metals";
Europhys. Lett., 95 (2011), 37005; S. 1 - 5.



Kurzfassung englisch:
Abstract -
It is generally believed that Veselago“s criterion for negative refraction cannot be
fulfilled in natural materials. However, considering imaginary parts of the permittivity (ε) and
permeability (µ) and for metals at not too high frequencies the general condition for
negative refraction becomes extremely simple: Re(µ) < 0 ⇒ Re(n) < 0 and may be fulfilled for such
natural ferromagnetic metals as nickel, iron, or cobalt. Here we demonstrate experimentally that
in pure cobalt and Fe/Co alloy the negative values of the refractive index can indeed be
achieved close
to the frequency of the ferromagnetic resonance. Large values of the negative refraction can
be obtained at room temperature and they can easily be tuned in moderate magnetic fields.


"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1209/0295-5075/95/37005


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.