Magnetic Effect on the Optical Energy Gap of ZnGeP2 Single Crystal

 M.S. Omar1, F.A. Mahmood1, & S.R. Saeed2

College of Science, Salahaddin University,  2 College of Science, University of Sulaimani


The magneto-opticol effect was investigated for the cholcopyrite compound 
ZnGeP2 ,the change in the energy gap due to the magnetic field was measured
to be =~ 0.002 eV at room temperature. The temperature coefficient of 
AEg.B(T)was found to be 1.67 X10-4 eV/K in lhe temperature range(300-400)K. 
the reduced effective mass of carriers m* wos calculated and it found to 
decrease with increasing temperature.

Keywords: ZnGeP2,Magneto-optical effect, Semiconductor compounds, Optical properties.


1-Omar,M.S.,Omar, B.M. and Mahmod,F.A.Arab.Gulf.J. Scient.Res.,1999,l7( l),59.
2-Zalkharov, N.A. and Chadysher,V.A,Soviet Physics Journal ,1986,29 ,597 .
3-Omar, M.S.Chaines J. of Synthetic Crystals 1998,27 (2),191.
4-Goodchild, R.G,Hughes, O.H., Lorez Rivera, S.A. and Wooley, J.C.,Can. J.Phys., 1982,60 ,1096
S-Callaway,J.,Quantum Theory of the Solid State, Academic press Inc.London Ltd.,1974.
6-Londau, L., Z. Phys.1930, 64, 629
7-Seitz, F.,The Modern Theory of Solids , McGraw- Hill .1940
S-Madlelung, O. Encyclopaedia of Physics Ed. Flugge,S. 2012, Springer-Verlag ,Berlin/ Gottingen / Heidelbery . 1957.
9-Pearson, G.L.And Bardeen, J., Phys .Rev .1949, 75,5 ,865 .
1O-Saeed ,S.R. Thesis , salahaddin university, Erbil .Iraqi Kurdistan,1991.