H. Mugirahardjo
Center for Technology of Nuclear Industry Materials, BATAN Puspiptek Serpong, Tangerang, Indonesia

Published : 3 Documents
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Crystallite Size and Microstrain Measurement of Cathode Material after Mechanical Milling using Neutron Diffraction Technique Fajar, A.; Gunawan, Gunawan; Kartini, E.; Mugirahardjo, H.; Ihsan, M.
Atom Indonesia Vol 36, No 3 (2010): December 2010
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (295.277 KB) | DOI: 10.17146/aij.2010.27

Abstract

The measurements of neutron diffraction patterns of commercially product and 10 hour mechanically milled cathode material lithium cobaltites (LiCoO2) have been performed. Rietveld analysis using FullProf does not show the change of crystal structure due to milling process, but the diffraction pattern has a lower intensity and the diffraction-line was broadening. The results of line-broadening study on milled sample using Rietveld methods detected that the microstrain was occurred in the sample with value 0.127080(35) % and the average crystallite size was 424.78(20) Å.Received: 7 October 2010; Revised: 31 October 2010; Accepted: 1 November 2010
DETERMINATION OF CRYSTAL AND MAGNETIC STRUCTURE OF La0,47Ca0,53Mn1-yCuyO3 (0 < y < 0.09) USING HIGH RESOLUTION NEUTRON POWDER DIFFRACTOMETER Gunanto, Y. E.; Purwanto, A.; F., Andika; Mugirahardjo, H.; A., Wisnu A.; Kurniawan, B.; Poertadji, S.
Jurnal Sains Materi Indonesia Vol 14, No 1 (2012): Oktober 2012
Publisher : BATAN

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Abstract

Crystal and magnetic structure of La0,47Ca0,53Mn1-yCuyO3 with 0 &lt; y &lt; 0.09 at low and room temperature have been analyzes using High Resolution Neutron Powder Diffraction (HRPD). It is obtained that at room temperature as well as at low temperature, the samples have orthorhombic structure with Pnma space group. Increasing x value, will increase the lattice volume. At room temperature, samples have paramagnetic stucture, while at low temperature have antiferromagnetic structure. The value of magnetic moment will decrease with increasing x value.Keywords: Crystal and magnetic structure, High Resolution Powder Diffraction.
The Performance of Fine Resolution Neutron Powder Diffractometer at PTBIN-BATAN Fajar, A.; Mugirahardjo, H.
Atom Indonesia Vol 36, No 1 (2010): April 2010
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1207.823 KB) | DOI: 10.17146/aij.2010.5

Abstract

We describe the performance of a fine resolution neutron powder diffractometer, DN3, which has been installed at the neutron guide (NG2) in the Neutron Guide Hall about 71 m away from the Multipurpose G. A. Siwabessy reactor core. DN3 has a multi-detector system which consists of 32 3He neutron detectors and soller-type collimation. The resolution curve of the instrument was found to have little variation over a wide angular region. The best resolution is Δ2θ (FWHM) of 0.23º and Δd / d of 5x10-3, where 2θ and d are scattering angle and d-spacing, respectively. The instrument provides sample environment of low temperatures using a cryostat having a temperature range of 10-300K. Several experimental results, interlaboratory comparison study and he next activities to improve the performance of DN3 equipment have also been discussed. Received: 15 October 2009; Revised: 12 April 2010; Accepted: 21 April 2010