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

Volume

45

Issue

6

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

2492

Lastpage

2495

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2018670

Filename

4957786