TITLE

Phase transitions in Ge–Te phase change materials studied by time-resolved x-ray diffraction

AUTHOR(S)
Raoux, Simone; Muñoz, Becky; Huai-Yu Cheng; Jordan-Sweet, Jean L.
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/5/2009, Vol. 95 Issue 14, p143118
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Resistivity versus temperature measurements and time-resolved x-ray diffraction were used to study Ge–Te phase change materials. Resistivity versus temperature measurements showed one sharp drop in resistivity for films with 30, 50, and 70 at. % Ge, two steps for films with 40 at. % Ge, and a gradual transition for films with 60 at. % Ge. Films with 30, 50, and 70 at. % Ge crystallized in a single-step process with GeTe and Te, only GeTe, and GeTe and Ge diffraction peaks, respectively. Films with 40 and 60 at. % Ge crystallized in a two-step process with GeTe peaks appearing first and additional Te or Ge peaks, respectively, appearing at higher temperature.
ACCESSION #
44539693

 

Related Articles

  • In situ high-pressure x-ray diffraction study of H2O ice VII. Somayazulu, Maddury; Jinfu Shu; Chang-sheng Zha; Goncharov, Alexander F.; Tschauner, Oliver; Ho-kwang Mao; Hemley, Russell J. // Journal of Chemical Physics;2/14/2008, Vol. 128 Issue 6, p064510 

    Ice VII was examined over the entire range of its pressure stability by a suite of x-ray diffraction techniques in order to understand a number of unexplained characteristics of its high-pressure behavior. Axial and radial polycrystalline (diamond anvil cell) x-ray diffraction measurements...

  • The crystal structures of δ and δ * nitrogen. Stinton, G. W.; Loa, I.; Lundegaard, L. F.; McMahon, M. I. // Journal of Chemical Physics;9/14/2009, Vol. 131 Issue 10, p104511 

    The crystal structures of the high-pressure δ and δ * phases of nitrogen have been investigated using single-crystal x-ray diffraction. The structure of the δ phase is very similar to isostructural γ-O2 and comprises spherically disordered molecules, with a preference for avoiding...

  • Modified laser diffractometer for investigating biological microobjects. Aksenov, E. T.; Mokrova, D. V. // Technical Physics Letters;Oct2008, Vol. 34 Issue 10, p878 

    A laboratory prototype of a two-channel optoelectronic laser diffractometer is described. In contrast to the conventional diffractometers, the proposed instrument has two channels: spectral and imaging. The results of investigations of both artificial inorganic samples and natural biological...

  • ESTUDIO DEL EQUIPO DE DIFRACCIÓN DE RAYOS X TEL-X-OMETER, TEL. 580. Gil Novoa, O. D.; Martínez B., D.; Barón González, A. J. // Revista Colombiana de Física;2006, Vol. 38 Issue 2, p786 

    The diffraction phenomena is the background of some materials characterization techniques, the X Ray Diffraction (XRD) is between them, this is a technique through one can study materials by means of crystallographic analysis of its structure. In this work the description of TEL-X-OMETER TEL....

  • Structure and vibrational spectra peculiarities of diamond-lonsdaleite system. Denisov, V. N.; Mavrin, B. N.; Serebryanaya, N. R.; Dubitskiy, G. A.; Aksenenkov, V.V.; Kirichenko, A. N.; Kuzmin, N.V.; Kulnitskiy, B. A.; Perezhogin, I. A.; Blank, V. D. // Izvestiya Vysshikh Uchebnykh Zavedenii. Seriya Khimiya i Khimich;2011, Vol. 54 Issue 7, p10 

    The results of study of polycrystalline powder of the diamond-lonsdaleite system by X-ray diffractometry, transmission electron microscopy and UV Raman spectroscopy are presented. The experimental data on structural parameters are in good agreement with ab initio calculations. The Raman spectrum...

  • Performance and Application of FEL and PXR Sources at Nihon University. Tanaka, T.; Hayakawa, K.; Hayakawa, Y.; Kuwada, T.; Sakai, T.; Nakao, K.; Takahashi, Y.; Nogami, K.; Inagaki, M.; Sato, I. // AIP Conference Proceedings;6/24/2010, Vol. 1234 Issue 1, p587 

    The infrared free electron laser (FEL) and the parametric X-ray radiation (PXR) developed on the basis of the 125 MeV electron linac at Nihon University have been applied to studies in a variety of scientific fields. Primary users so far are the faculty members in the university, approximately...

  • Large second-order optical nonlinearity in 30BaO–15TiO2–55GeO2 surface crystallized glass with strong orientation. Masai, Hirokazu; Fujiwara, Takumi; Benino, Yasuhiko; Komatsu, Takayuki // Journal of Applied Physics;7/15/2006, Vol. 100 Issue 2, p023526 

    The correlation between the orientation degree of surface crystalline phase and the second-order optical susceptibility, d coefficient for second-harmonic generation, in 30BaO–15TiO2–55GeO2 (BTG55) crystallized glass was investigated using x-ray diffraction measurements and a Maker...

  • Pixel Detectors For Diffraction Experiments At The Swiss Light Source. Hüsen, G.; Eikenberry, E. F.; Horisberger, R.; Schmitt, B.; Schulze-Briese, C.; Tomizaki, T.; Toyokawa, H.; Stampanoni, M.; Borchert, G. L.; Willmott, P.; Patterson, B.; Brönnimann, Ch.; Warwick, T. // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p1009 

    The PILATUS detector (Pixel Apparatus for the SLS) is a large, quantum-limited area X-ray detector for protein crystallography which is currently under construction. Its basic units are modules with 16 CMOS chips bump-bonded to a large, continuously sensitive silicon sensor with 157×366...

  • A New Camera for Powder Diffraction of Macromolecular Crystallography at SPring-8. Miura, Keiko; Inoue, Katsuaki; Goto, Shunji; Ishikawa, Tetsuya; Yamamoto, Masaki; Ueki, Tatzuo; Warwick, T. // AIP Conference Proceedings;2004, Vol. 705 Issue 1, p989 

    A powder diffractometer of Guinier geometry was developed and tested on a beamline, BL40B2, at SPring-8. The long specimen-to-detector distance, 1,000 mm, is advantageous in recording diffraction from Bragg spacing of 20 nm or larger. The angular resolution, 0.012 degrees, was realized together...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

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

Try another library?
Sign out of this library

Other Topics