Title :
Local Ordering Study of Nanostructure FeMnAl Alloys
Author :
Tarigan, Kontan ; Yoo, Yong-Goo ; Yang, Dong-Seok ; Grenèche, J.M. ; Yu, Seong-Cho
Author_Institution :
Dept. of Phys., Chungbuk Nat. Univ., Cheongju
fDate :
6/1/2009 12:00:00 AM
Abstract :
Fe55Mn10Al35 alloys were prepared by mechanical alloying. Local ordering around the central atom was examined with milling time by using extended X-ray absorption fine structure. The structural and magnetic evolution was analyzed by EXAFS and Mossbauer study as a function of milling time. The first shell of the Fourier transformed spectra changed with milling time, indicating a change in the local ordering around the central Fe atom. X-ray diffraction patterns indicate a bcc phase after 24 h milling time. For 1 h milled sample, Mossbauer spectra analysed three sextets as bcc-Fe phase, broad sextet and Fe surrounded Al and Mn phase. The magnetization showed decrease with milling time corresponding to magnetic dilution.
Keywords :
EXAFS; Fourier transform spectra; Mossbauer effect; X-ray diffraction; aluminium alloys; iron alloys; magnetic structure; magnetisation; manganese alloys; mechanical alloying; milling; nanostructured materials; nanotechnology; EXAFS; Fe55Mn10Al35; Fourier transformed spectrum; Mossbauer spectrum; X-ray diffraction pattern; extended X-ray absorption fine structure; magnetic dilution; magnetic structure; magnetization; mechanical alloying; milling; nanostructure alloy preparation; time 1 h; time 24 h; Extended X-ray absorption fine structure (EXAFS); MÖssbauer spectra and FeMnAl; local structure;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2009.2018670