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Electric-dipole spin resonance in wurtzite ZnO

Michaluk E., Wilamowski Z., Błoniarz J., Mycielski A.

Optica Applicata

2006

Vol. 36, nr 2-3

291-296

The electron spin resonance (ESR) measurements of the electric-dipole spin resonance (EDSR) of donor-bound electrons in ZnO wurtzite crystals are reported. This phenomenon was measured in longitudinal Voigt geometry (E1 | | B0 c) at low magnetic field and at low microwave frequency. The ESR transitions observed consist of two comparable signals: magnetic dipole spin resonance (MDSR) and electric dipole spin resonance (EDSR).

The bismuth - doping effect on the Jahn-Teller phase transition in CsDy(MoO4)2 crystal

Gerashchenko S. S., Miloslavskaya O. V., Kharchenko Y. N., Kut'ko V. I., Nesterenko N. M., Macalik L., Hermanowicz K., Mączka M., Hanuza J.

Materials Science

2002

Vol. 20, No. 2

81-89

Using spectroscopic and visual optical methods the shift of the critical temperature (Ttr~42K) of the first-order phase transition of the Jahn-Teller type to the lowtemperature side at doping the CsDy(MoO4)2 crystal with Bi3+ (concentration up to x~0.08) was revealed. Effect of the doping is compared to the effect of uniaxial pressure. Using the result of the Zeeman effect we have calculated the critical value Hc of external magnetic field at which the spontaneous change of the sizes of crystal is suppressed under magnetic field and the high-temperature phase may be induced at T=0°K. It is supposed that doping with Bi3+ leads to decrease of the critical magnetic field value for doped CsDy(MoO4)2 .