Zobrazeno 1 - 10
of 82
pro vyhledávání: '"C. W. Kimball"'
Autor:
Dennis E. Brown, J.-H. Song, Bogdan Dabrowski, T.-W. Kim, C. W. Kimball, M.-S. Kim, Stanislaw Kolesnik, Y. Z. Yoo, A. P. Genis, Omar Chmaissem
Publikováno v:
Applied Physics A. 115:913-917
Fe-doping (up to 11 mole%) into SrRuO3 (SRO) thin films on SrTiO3 substrates decreased correlation lengths of both surface and interface. It turned out that Fe was doped in the valence state of 3+ without formation of the Fe2O3 phase, which caused or
Autor:
R. Kruk, R. Kmiec, Piotr W. Klamut, Bogdan Dabrowski, Dennis E. Brown, C. W. Kimball, M. Maxwell
Publikováno v:
Physica C: Superconductivity. 370:71-78
Mossbauer effect measurements on 155 Gd and 99 Ru in RuSr2GdCu2O8 reveal that both Gd and Ru magnetic moments are ordered in the superconducting state. Ru orders antiferromagnetically below ≈132 K as observed from susceptibility measurements and re
Autor:
Omar Chmaissem, C. W. Kimball, Dennis E. Brown, R. Kruk, Bogdan Dabrowski, X. Xiong, Stanislaw Kolesnik, James D. Jorgensen
Publikováno v:
Physical Review B. 62:14197-14206
The nuclear and magnetic structures of ${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6}$ have been investigated using neutron powder diffraction and M\"ossbauer spectroscopy at temperatures between 10 and 460 K. Fe and Mo atoms are found to order on alternate
Autor:
C. W. Kimball, S. Short, X. Xiong, S.M. Mini, Jason P. Hodges, Bogdan Dabrowski, James D. Jorgensen
Publikováno v:
Journal of Solid State Chemistry. 151:190-209
Over the oxygen composition range 2.5≤x≤3.0, the SrFeOx system exists as four distinct compounds with the nominal composition SrnFenO3n−1 (n=2, 4, 8, and ∞). The end member SrFeO3 (n=∞) possesses a simple cubic perovskite crystal structure,
Autor:
Ray Dybzinski, C. W. Kimball, Stanislaw Kolesnik, Bogdan Dabrowski, Omar Chmaissem, X. Xiong, James D. Jorgensen, Z. Bukowski
Publikováno v:
Physical Review B. 60:10186-10192
The magnetic structure and its correlation with the Jahn-Teller (JT) distortion in lightly doped La{sub 1{minus}x}Sr{sub x}MnO{sub 3} (0.11{le}x{le}0.185) have been studied as a function of temperature from 10{endash}300 K using neutron powder diffra
Autor:
Omar Chmaissem, Z. Bukowski, Ray Dybzinski, J. Shaffer, X. Xiong, Piotr W. Klamut, James D. Jorgensen, C. W. Kimball, Bogdan Dabrowski, J. E. Siewenie, S. Short
Publikováno v:
Physical Review B. 60:7006-7017
By combining the results of magnetization, resistivity, and neutron powder-diffraction data for stoichiometric ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3},$ we have constructed a phase diagram that describes the magnetic, tra
Autor:
B. Pyles, Dennis E. Brown, B. D. Dunlap, X. Xiong, K. Rogacki, A. Tkachuk, C. W. Kimball, D. Rosenmann, A. J. Fedro, Bogdan Dabrowski
Publikováno v:
Physical Review B. 57:8509-8517
Two samples with the same nominal composition La{sub 0.83}Sr{sub 0.17}Mn{sub 0.98}{sup 57}Fe{sub 0.02}O{sub 3} were prepared in air and argon. Thermograviametric, structural, resistive, and magnetic measurements show that the air-made sample has slig
Publikováno v:
Hyperfine Interactions. 72:153-172
A Mossbauer study has been made on57Fe ions substituted into the Cu(1) site of REBa2Cu3−xFexO7+δ (RE=Y, Er, Dy, Gd;x=0.15, 0.30). At low temperature, the iron atoms antiferromagnetically order with a transition temperature which is dependent on th
Autor:
M. G. Smith, C. W. Kimball, R. D. Taylor, Weimin Peng, Arumugam Manthiram, John B. Goodenough
Publikováno v:
Journal of Solid State Chemistry. 98:181-186
{sup 119}Sn and {sup 121}Sb Moessbauer spectra indicate the presence of Sb{sup 5+} and Sn{sup (4{minus}x)+} ions down to 1.2 K without evidence for disproportionation into Sn{sup 2+}, Sn{sup 4+} or Sb{sup 3+}, Sb{sup 5+}. It is argued that stabilizat
Autor:
B. D. Dunlap, Shiyou Pei, James D. Jorgensen, Y. Zheng, V.J. Melim, D. G. Hinks, Weimin Peng, A. W. Mitchell, D.R. Richards, C. W. Kimball, Bogdan Dabrowski
Publikováno v:
Physica C: Superconductivity. 191:151-157
Single phase samples of (Ba 1− x K x )(Bi 1− y Sb y )O 3 have been synthesized over a limited compositional range using a two-step procedure: high-temperature firing in a low oxygen partial pressure followed by low-temperature oxygen annealing. F