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  Ferromagnetic, ferrimagnetic and spin-wave resonances in GaMnAs layers

Fedorych, O., Byszewski, M., Wilamowski, Z., Potemski, M., & Sadowski, J. (2002). Ferromagnetic, ferrimagnetic and spin-wave resonances in GaMnAs layers. Acta Physica Polonica A, 102(4-5), 617-625.

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 Creators:
Fedorych, O., Author
Byszewski, M.1, Author           
Wilamowski, Z., Author
Potemski, M.1, Author           
Sadowski, J., Author
Affiliations:
1High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society, ou_3371774              

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 Abstract: Molecular beam epitaxy grown Gal(1-x)Mn(x)As layers were
investigated by means of magnetic resonances. With an increase
in Mn concentration, x, the spectrum changes from the (i)
paramagnetic one, with resolved fine and hyperfine structures,
typical of S = 5/2 spin of substitutional Mn2+ ions, for very
diluted alloy, via (ii) paramagnetic spectrum, where the fine
and hyperfine structures are averaged by a long range Mn2+-Mn2+
exchange coupling, (iii) single, isotropic line of
ferromagnetic resonance. Insulator to metal transition is
accompanied with occurrence of (iv) a very complex spectrum of
the ferrimagnetic resonance, accompanied with the well-resolved
spin wave resonance. Reentrance to insulator phase for the most
condensed alloys is accompanied with the reentrance to (v)
ferromagnetic phase. The data confirm that the effective mass
holes transfer the exchange interaction between localized Mn2+
spins.

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Language(s): eng - English
 Dates: 2002
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 7491
ISI: 000179251900013
 Degree: -

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Title: Acta Physica Polonica A
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 102 (4-5) Sequence Number: - Start / End Page: 617 - 625 Identifier: ISSN: 0587-4246