TITLE

Variations of long- and short-range-order structural and magnetic properties of thermally annealed Mn/GaAs digital alloys

AUTHOR(S)
Soo, Y. L.; Wang, S.; Kim, S.; Kim, G.; Cheon, M.; Chen, X.; Luo, H.; Kao, Y. H.; Sasaki, Y.; Liu, X.; Furdyna, J. K.
PUB. DATE
September 2003
SOURCE
Applied Physics Letters;9/22/2003, Vol. 83 Issue 12, p2354
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The crystal structure and local environment surrounding Mn atoms in Mn/GaAs digital layers thermally annealed at different temperatures have been investigated using x-ray diffraction and extended x-ray absorption fine structure methods. As the annealing temperature is increased, a satellite peak near the GaAs (004) diffraction line systematically shifts towards higher angles, indicating an apparent decrease of lattice parameters in the Mn/GaAs layers. When the annealing temperature is increased to 550 °C the satellite peak position moves dramatically from below to above the GaAs (004) peak, accompanied by a corresponding increase of Mn–As bond length from 2.48 to 2.56 Å, suggesting that the local structure around Mn changes from Ga substitution in GaAs to that of MnAs-like phase. Variations of the long- and short-range-order structures are believed to be related to the observed changes of magnetic properties including the disappearance of ferromagnetism in the sample annealed at 550 °C. © 2003 American Institute of Physics.
ACCESSION #
10848415

 

Related Articles

  • Thermal and ion irradiation stability of direct current sputtered TiN/B--C--N multilayers. Fayeulle, S.; Nastasi, M. // Applied Physics Letters;3/3/1997, Vol. 70 Issue 9, p1098 

    Examines thermal and ion stability of vacuum annealed TiN/B-C-N multilayers. Formation of multilayer structures; Description of multilayer microscopy images; Analysis of x-ray diffraction spectra of multilayers.

  • Local variations of the index of refraction of a Bi, Al-doped garnet film by laser annealing. Stashkevich, A. A.; Gouzerh, J.; Ben Youssef, J. // Journal of Applied Physics;11/15/1991, Vol. 70 Issue 10, p6283 

    Focuses on a study which examined the influence of laser annealing on the index of refraction of aluminum-doped ferrimagnetic garnet films in the near-infrared domain. Characteristics of diffraction grating; Patterns of diffraction; Profiles of saturation magnetization.

  • Synthesis and crystal growth of the high-Tc phase in Bi–Pb–Sr–Ca–Cu–O system with variation of excess concentrations of CaO and CuO. Wu, Qianzhang; Fu, Zhengmin; Zhang, Aizhen; Huang, Jiashan; Tang, Disheng; Yao, Pei; Chu, Shaoyan; Yi, Sunsheng; Rong, Xishen; Zhang, Anzhi; Cheng, Xianan // Journal of Applied Physics;3/15/1992, Vol. 71 Issue 6, p2772 

    Investigates the effect of sintering temperature and duration as well as annealing conditions on the formation and the fraction of the 110-K phase in samples in the bismuth-strontium-calcium-copper-oxygen system. Nominal compositions of the samples; Diffraction lines for each phase taken for...

  • Analysis of x-ray diffraction as a probe of interdiffusion in Si/SiGe heterostructures. Aubertine, D. B.; Ozguven, N.; McIntyre, P. C.; Brennan, S. // Journal of Applied Physics;8/1/2003, Vol. 94 Issue 3, p1557 

    We investigate numerical simulations that utilize a nonlinear interdiffusion solver and dynamical x-ray diffraction calculations to predict the local composition evolution in low Ge concentration Si/SiGe superlattices and their diffraction patterns during annealing. Superlattice satellite peak...

  • The effect of Mn on the positive temperature coefficient of resistance characteristics of donor doped BaTiO3 ceramics. Al-Allak, H. M.; Brinkman, A. W.; Russell, G. J.; Woods, J. // Journal of Applied Physics;5/1/1988, Vol. 63 Issue 9, p4530 

    Presents a study which investigated the effect of manganese on the positive temperature coefficient of resistance characteristics of specimens annealed at high temperature for different periods of time in an experiment. Details of the experiment; Results; Discussion.

  • Phase selection during pulsed laser annealing of manganese. Follstaedt, D. M.; Peercy, P. S.; Perepezko, J. H. // Applied Physics Letters;2/3/1986, Vol. 48 Issue 5, p338 

    Pulsed (25 ns) laser-induced heating of the α phase of Mn is found to be sufficiently rapid to bypass solid-state transformation to the high-temperature β, γ, and δ allotropes and thus produce melts that are calculated to be undercooled by ∼120 K with respect to the equilibrium...

  • Relationship between the structure and soft magnetic properties of FeRuGaSi films. Zeltser, A. M.; Jagielinski, T. M. // Journal of Applied Physics;11/15/1991, Vol. 70 Issue 10, p6250 

    Investigates the effect of annealing on the structure and magnetic properties of films sputtered on manganese-nickel-oxide and lithium-silicate glass-ceramic substrates. Best combination of soft magnetic properties; Temperature range at which annealing will produce the best combination;...

  • Depth profiles of manganese implants in InP after annealing. Chaplain, R.; Gauneau, M.; L’Haridon, H.; Rupert, A. // Journal of Applied Physics;9/1/1985, Vol. 58 Issue 5, p1803 

    Presents a study that reported the depth profiles of manganese (Mn) implants, after annealing, obtained by secondary ion mass spectrometry. Correlations between the movement of the residual impurities and the implanted Mn atoms, or zinc in a comparative sample; Types of substrates;...

  • Preparation of Mn[sub 3] O[sub 4] nanowires by calcining the precursor powders synthesized in a novel inverse microemulsion. Liu, Y.; Liu, Z.; Wang, G. // Applied Physics A: Materials Science & Processing;2003, Vol. 76 Issue 7, p1117 

    Manganese oxide (hausmannite) nanowires were prepared by annealing precursor powders at a temperature of 800 °C for 3 h, which were produced in a novel inverse microemulsion (IμE) system. The microstructures of the as-prepared Mn[sub 3] O[sub 4] nanowires were investigated by means of...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics