Second-Order Phase Transitions in Non-Magnetic Wurtzite ZnO and Magnetic Doped with Co

• Authors: H. Kunert , P. Niyongabo
• Languages of publication: EN

Abstracts

EN

We investigate the second-order phase transitions in non-magnetic wurtzite ZnO and magnetic doped with cobalt. Using reformulated Landau-Lifshitz theory of second-order phase transitions and our computer program, we have found all possible lower space group symmetries of ZnO and ZnO doped with Co as well as symmetries of vibration modes which may cause structural phase transitions. We interpret the Raman phonon modes of magnetic doped ZnO according to corepresentations of the magnetic space group P6'₃m'c (ZnO magnetic). Some experimental techniques like X-ray diffraction, reflectivities and Raman spectroscopies can verify our theoretical results.

Keywords

EN

75.50.Pp

Discipline

• 75.50.Pp: Magnetic semiconductors

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 400-403

Dates

published

2015-02

Contributors

author

H. Kunert

• Department of Physics, University of Pretoria, Pretoria 0002, South Africa

author

P. Niyongabo

• Department of Physics, University of Pretoria, Pretoria 0002, South Africa

References

• [1] L.D. Landau, E.M. Lifshitz, Statistical Physics, Pergamon Press, London 1958
• [2] G.Ya. Lyubarskii, The Application of Group Theory in Physics, translated by S. Dedijer, Pergamon Press, 1960
• [3] E.P. Wigner, Group Theory and its Application to the Quantum Mechanics of Atomic Spectra, Academic Press, New York 1959
• [4] A.P. Cracknell, Magnetism in Crystalline Materials, Pergamon Press, Oxford 1965
• [5] H.T. Stokes, D.M. Hatch, Phys. Rev. B 30, 4962 (1984), doi: 10.1103/PhysRevB.30.4962
• [6] G. Fröbenius, I. Schur, Berl. Ber. 1906 186 (1906) http://zbmath.org/?q=an:02646565
• [7] W.F. Karavaev, Sov. Phys.-Solid State 6, 2943 (1965)
• [8] A.P. Cracknell, B.L. Davies, S.C. Miller, W.F. Love, Kronecker Product Tables, Vols. 1-4, IFI/Plenum, New York 1979

Identifiers

DOI

10.12693/APhysPolA.127.400