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15 Aug 2010

Volume 108, Issue 4, Articles (04xxxx)

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J. Appl. Phys. 108, 041901 (2010); http://dx.doi.org/10.1063/1.3474648 (2 pages)

Sergei V. Kalinin, Nava Setter, and Andrei L. Kholkin
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Changing vacancy balance in ZnO by tuning synthesis between zinc/oxygen lean conditions

Vishnukanthan Venkatachalapathy, Augustinas Galeckas, Asier Zubiaga, Filip Tuomisto, and Andrej Yu. Kuznetsov

J. Appl. Phys. 108, 046101 (2010); http://dx.doi.org/10.1063/1.3462394 (3 pages) | Cited 1 time

Online Publication Date: 25 August 2010

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The nature of intrinsic defects in ZnO films grown by metal organic vapor phase epitaxy was studied by positron annihilation and photoluminescence spectroscopy techniques. The supply of Zn and O during the film synthesis was varied by applying different growth temperatures (325–485 °C), affecting decomposition of the metal organic precursors. The microscopic identification of vacancy complexes was derived from a systematic variation in the defect balance in accordance with Zn/O supply trends.
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71.55.Gs II-VI semiconductors
78.55.Et II-VI semiconductors
78.66.Hf II-VI semiconductors
81.05.Dz II-VI semiconductors
61.72.jd Vacancies
78.70.Bj Positron annihilation
81.15.Gh Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.)
68.55.ag Semiconductors

Electrical detection of large cone angle spin precession from the linear to the nonlinear regime

Xiaolong Fan, E. Himbeault, Y. S. Gui, A. Wirthmann, G. Williams, Desheng Xue, and C.-M. Hu

J. Appl. Phys. 108, 046102 (2010); http://dx.doi.org/10.1063/1.3474662 (3 pages) | Cited 1 time

Online Publication Date: 30 August 2010

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The spin precession cone angle in a 5 μm wide Py microstrip has been investigated systematically from the linear to the nonlinear regime. At low power excitations, the cone angle increases linearly with the amplitude of the microwave magnetic field h. However, when h exceeds a critical value, a foldover resonance lineshape shows up, and the precession cone angle starts to increase with h1/3. The maximum cone angle reported in the present study reaches 22°.
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76.50.+g Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance
75.40.Gb Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.)
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