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All Journal Journal of Mathematical and Fundamental Sciences Indonesian Journal of Physics (IJP)
Khairul Basar
Faculty Of Mathematics And Natural Sciences, Institut Teknologi Bandung, Indonesia
Astronomy Chemistry Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Mathematics Physics

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Diffuse Neutron Scattering of KBr at Room Temperature and Its Application as Background Function in Rietveld Analysis Khairul Basar; Xianglian Xianglian; Takashi Sakuma; Haruyuki Takahashi; Naoki Igawa
Journal of Mathematical and Fundamental Sciences Vol. 41 No. 1 (2009)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2009.41.1.5

Abstract

Diffuse neutron scattering from powder KBr was measured at room temperature. The oscillatory diffuse scattering is clearly observed. The diffuse scattering theory including correlation effects among thermal displacements of atoms is applied to background function in the Rietveld analysis. The observed scattering data are analyzed by including the correlation effects among thermal displacements of first, second and third nearest neighboring atoms. The inter-atomic distance and temperature dependence of the values of correlation effects is discussed.
Anneal Temperature Effect on Crystallite Size and Electric Conductivity of LiMn2O4 Khairul Basar; Xianglian Xianglian; Sainer Siagian; Kouta Ohara; Takashi Sakuma; Haruyuki Takahashi; Osami Abe; Naoki Igawa; Yoshinobu Ishii
Indonesian Journal of Physics Vol 20 No 1 (2009): Vol. 20 No. 1, January 2009
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (96.335 KB) | DOI: 10.5614/itb.ijp.2009.20.1.3

Abstract

Powder samples of LiMn2O4 have been prepared by solid state reaction of LiOH and MnO2. Neutron scattering experiments at room temperature and conductivity measurement have been performed on the samples. Anneal temperature effect on the crystallite size and electric conductivity of LiMn2O4 is analyzed. The average crystallite size is obtained from the full width at half maximum (FWHM) of Bragg lines using Scherrer equation. The average crystallite size increases with the increase of anneal temperature. Activation energy and conductivity prefactor increase with anneal temperature.
Co-Authors Haruyuki Takahashi Haruyuki Takahashi Kouta Ohara Naoki Igawa Naoki Igawa Osami Abe Sainer Siagian Takashi Sakuma Takashi Sakuma Xianglian Xianglian Xianglian Xianglian Yoshinobu Ishii