Publications in Scientific Journals:
S. Engelbrecht, A. M. Shuvaev, Y. Luo, V. Moshnyaga, A. Pimenov:
"Negative refraction in natural ferromagnetic metals";
Europhys. Lett.,
95
(2011),
37005;
1
- 5.
English abstract:
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.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1209/0295-5075/95/37005
Created from the Publication Database of the Vienna University of Technology.