TITLE

Dissimilarity of polar displacements in barium and lead based relaxors

AUTHOR(S)
Phelan, D.; Millican, J. N.; Gehring, P. M.
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/16/2010, Vol. 97 Issue 7, p072903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Powder neutron diffraction experiments were performed on the relaxor compound, Ba(Zn1/3Nb2/3)0.95Ti0.05O3, which was recently shown to have stronger frequency dependence in its permittivity than many Pb-based relaxors (PBR), such as PbMg1/3Nb2/3O3 [L. Khemakhem et al., J. Alloys Compd. 452, 451 (2008)]. Several notable differences in structural properties were observed in the present measurements compared to PBR. In particular, much smaller atomic displacement parameters were found, especially on the A (Ba) site, which indicates that the local shifts of the Ba atoms are much smaller than the Pb shifts in PBR. Moreover, no signature of electrostrictive strain is apparent in the thermal expansion, and instead the thermal expansion is much larger at low temperatures than for PBR.
ACCESSION #
52997910

 

Related Articles

  • Neutron-diffraction studies of YMnO[sub 3]. Park, J.; Kong, U.; Pirogov, A.; Choi, S.I.; Park, J.-G.; Choi, Y.N.; Lee, C.; Jo, W. // Applied Physics A: Materials Science & Processing;Dec2002 Supplement, Vol. 74 Issue 6, ps796 

    We have made thermal expansion and neutrondiffraction studies of YMnO[sub 3], and found that our bulk measurements showed anomalous behavior at T[sub N] = 80 K. The analysis of the neutron-diffraction data shows that the magnetic scattering of YMnO[sub 3] can be described equally well by the...

  • Thermal-expansion behavior of a directionally solidified NiAl–Mo composite investigated by neutron diffraction and dilatometry. Bei, H.; George, E. P.; Brown, D. W.; Pharr, G. M.; Choo, H.; Porter, W. D.; Bourke, M. A. M. // Journal of Applied Physics;6/15/2005, Vol. 97 Issue 12, p123503 

    The thermal expansion of directionally solidified NiAl–Mo eutectic alloys consisting of nanoscale Mo fibers embedded in a NiAl matrix was analyzed by neutron diffraction and dilatometry. From room temperature to 800 °C, perpendicular to the fiber direction, the NiAl and Mo phases...

  • Determination of Coherency and Rigidity Temperatures in Al-Cu Alloys Using In Situ Neutron Diffraction During Casting. Drezet, Jean-Marie; Mireux, Bastien; Szaraz, Zoltan; Pirling, Thilo // JOM: The Journal of The Minerals, Metals & Materials Society (TM;Aug2014, Vol. 66 Issue 8, p1425 

    The rigidity temperature of a solidifying alloy is the temperature at which the solid phase is sufficiently coalesced to transmit tensile stress. It is a major input parameter in numerical modeling of solidification processes as it defines the point at which thermally induced deformations start...

  • Fine Crystalline Structure of Microcrystalline Alloys. Goman'kov, V.I.; Kovalev, A.I.; Va&icaron;nshte&icaron;n, D.L.; Zhigalina, O.M.; Tret'yakova, S.M.; Fykin, L.E. // Doklady Physics;May2004, Vol. 49 Issue 5, p285 

    Analyzes the fine crystalline structure of microcrystalline alloys. Formation of microcrystalline alloys in the hardening process from a melt; Chemical composition; Neutron diffraction patterns of microcrystalline alloys.

  • In-situ neutron diffraction study of deformation behavior of a multi-component high-entropy alloy. Wu, Y.; Liu, W. H.; Wang, X. L.; Ma, D.; Stoica, A. D.; Nieh, T. G.; He, Z. B.; Lu, Z. P. // Applied Physics Letters;2/3/2014, Vol. 104 Issue 5, p051910-1 

    Deformation behavior of a high-entropy alloy (HEA) was investigated by in situ tensile deformation with neutron diffraction. It was found that the face-centered cubic (FCC) HEA alloy showed strong crystal elastic and plastic anisotropy, and the evolution of its lattice strains and textures were...

  • Site affinity of substituents in Nd2Fe17-xTx (T=Cu,Zr,Nb,Ti,V) alloys. Yelon, W. B.; Hu, Z.; James, W. J.; Marasinghe, G. K. // Journal of Applied Physics;4/15/1996, Vol. 79 Issue 8, p5939 

    Focuses on the location of substitutional atoms within the iron lattice in order to understand the magnetic properties of the substituted rare-earth-iron alloys. Collection of powder neutron diffraction patterns; Method used to prepare the refinements of the neutron diffraction data;...

  • Theoretical estimation of coefficient of thermal expansion for solder alloy. Lee, Boon Kwang; Jin, Hong Mei; Wu, Ping // Journal of Materials Science;Mar2003, Vol. 38 Issue 6, p1135 

    Coefficient of thermal expansion (CIE) of solder alloy Sn-37%Pb was estimated by using cluster expansion method. Five phases with available experimental CTE in Sn-Pb system were employed to derive the correlation coefficient qi. Monte-Carlo simulation was carried out to obtain the correlation...

  • Dynamic and Thermal Properties of Aluminum Alloy A356/Silicon Carbide Hollow Particle Syntactic Foams. Cox, James; Luong, Dung D.; Shunmugasamy, Vasanth Chakravarthy; Gupta, Nikhil; III, Oliver M. Strbik; Kyu Cho // Metals (2075-4701);2014, Vol. 4 Issue 4, p530 

    Aluminum alloy A356 matrix syntactic foams filled with SiC hollow particles (SiCHP) are studied in the present work. Two compositions of syntactic foams are studied for quasi-static and high strain rate compression. In addition, dynamic mechanical analysis is conducted to study the temperature...

  • Stress Corrosion Cracking Behavior at Inconel and Low Alloy Steel Weld Interfaces. Tomota, Yo; Daikuhara, Shin; Nagayama, Shun; Sugawara, Masanori; Ozawa, Norihiko; Adachi, Yoshitaka; Harjo, Stefanus; Hattori, Shigeo // Metallurgical & Materials Transactions. Part A;Dec2014, Vol. 45 Issue 13, p6103 

    Three-dimensional microstructure observations, macro- to micro-scopic residual stress measurements by three methods and creviced bent beam SCC tests were performed for Inconel/low alloy steel (LAS) weld samples. The possible reasons for the suppression of SCC crack propagation near the weld...

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