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Influence of Mn-oxide Nanoclusters on the Electric Properties of ZnO:Mn Films
Vadim Sh. Yalishev,홍사환,박배호,V. Pelenovich,율다세프 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
Polycrystalline ZnO:Mn films have been deposited on Si substrates by using ultrasonic spray pyrolysis methods. ZnO:Mn (3%) films show hysteretic behaviors in the I-V curves and these behaviors are related to charging and discharging of Mn-oxide nanoclusters. The conditions for hysteresis to appear depend on the sizes of the formed Mn-oxide nanoclusters close to the electrode interfaces.
Photoluminescence and Magneto-optical Properties of Zn1−xMnxO
율다세프,강태원,Vasiliy O. Pelenovich,Uygun V. Valiev 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.3
Zn1−xMnxO thin films on quartz substrates with a low concentration of Mn (1%) were prepared by using ultrasonic spray pyrolysis. Photoluminescence, optical absorption, and magnetic circular dichroism (MCD) measurements were conducted in order to study the optical and the magnetic properties of Zn0.99Mn0.01O. The free exciton lines are dominant in the spectra of these samples, which indicates a high crystal quality for the films. Magneto-optical measurements show a significant MCD at the band edge of Zn0.99Mn0.01O at room temperature.
Magnetic and Optical Properties of Zn1-xMnxO Thin Films Prepared by Using Ultrasonic Spray Pyrolysis
Shavkat U. Yuldashev,전희창,강태원,율다세프,Irina V. Khvan,Vasiliy O. Pelenovich 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.1
Diluted magnetic semiconductor Zn1-xMnxO (x = 0.05) thin films were prepared using ultrasonic spray pyrolysis. The films were additionally doped with nitrogen in order to obtain a p-type conductivity. Aqueous solutions of zinc acetate (0.5 mol/l), manganese acetate (0.5 mol/l) and ammonium acetate (2.5 mol/l) were used as sources of Zn, Mn and N, respectively. The hole concentration in the nitrogen-doped lms was in the range of 1015 -1018 cm-3 at room temperature. The dependence of the magnetization on the magnetic field (M-H) for the highly nitrogen-doped Zn0.95Mn0.05O sample showed a hysteresis loop at low temperatures. A Curie temperature of around 80 K for the sample with a hole concentration of 1018 cm-3 was determined from the temperature dependence of the magnetization.