Crystallographic and Magnetic Properties of KFeO $_2$

Author

Moon, Seung Je ; Shim, In-Bo ; Kim, Chul Sung

Author_Institution

Dept. of Phys., Kookmin Univ., Seoul

Volume

42

Issue

10

fYear

2006

Firstpage

2879

Lastpage

2881

Abstract

The crystallographic and magnetic properties of KFeO₂ powder prepared by ball-mill method, have been studied by X-ray diffraction (XRD), Mossbauer spectroscopy, and vibrating sample magnetometer (VSM) measurements. The crystal structure of KFeO₂ powder at room temperature is determined to be an orthorhombic structure of Pbca with its lattice constants a₀=5.594,b₀=11.247, and c₀=15.863 Aring by Reitveld refinement. The M-H curves show antiferromagnetic behavior at 34 K and room temperature. Mossbauer spectra of KFeO₂ were taken at various temperatures ranging from 4.2 to 600 K. And the Neel temperature (T_N) was determined to be 930 K. The magnetic hyperfine field and isomer shift value at 4.2 K were 519 kOe and 0.19 mm/s, respectively

Keywords

Mossbauer spectroscopy; X-ray diffraction; antiferromagnetism; ball milling; iron alloys; magnetic particles; magnetometers; potassium alloys; 4.2 to 600 K; 930 K; KFeO₂; M-H curves; Mossbauer spectra; Mossbauer spectroscopy; Neel temperature; Reitveld refinement; VSM measurements; X-ray diffraction; XRD; ball-mill method; crystal structure; crystallographic properties; magnetic hyperfine field; magnetic properties; orthorhombic structure; vibrating sample magnetometer; Crystallography; Magnetic properties; Magnetometers; Powders; Spectroscopy; Temperature distribution; Vibration measurement; X-ray diffraction; X-ray imaging; X-ray scattering; Alkali materials; MÖssbauer spectroscopy; ball-mill method; potassium;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.880275

Filename

1704469