MAGNONS IN LAYERED MNTE CDTE STRUCTURES

An experimental and theoretical analysis of spin-wave excitations (mag nons) in ultra-thin films of a magnetic semiconductor has been perform ed. Cubic MnTe, which possesses a frustrated long-range antiferromagne tic order when deposited in thick layers, was the material selected fo r such studies. In the low-frequency part of the Raman spectra, a comp lex structure has been observed in crossed polarization -z(x, y)z at l ow temperature on (MnTe)(k)/(CdTe)(m) multilayers (where m greater tha n or equal to 8). This structure can be attributed to magnons in thin MnTe slabs. (C) 1998 Elsevier Science B.V. All rights reserved.