Coherent interaction of light with atomic dipole moments in single-crystalline gadolinium
A. B. BeznosovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. P. GnezdilovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. V. EremenkoPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
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The interaction of light with systems of almost free quasibound electrons in single-crystalline gadolinium in the region of d–f exchange resonance (0.49 ≤ ℏω ≤ 1.1 eV; 4.2 ≤ T ≤ 343 K) is studied experimentally and theoretically. It is found that the position of the resonant optical-absorption bands is determined by the d–f exchange interaction within a single atom, and their intensity is determined by the orientation and degree of ordering of the intra-atomic optical dipoles.
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