Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction

Hajime Hojo, Koji Fujita, Katsuhisa Tanaka, Kazuyuki Hirao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Polycrystalline β-Ga2O3 doped with Fe 3+, (Ga1-xFex)203 (x=0.02, 0.05, 0.08 and 0.1), has been prepared by a solid-state reaction. Ferromagnetic ordering is observed at room temperature for samples prepared by β-Ga2O3 and Fe(NO3)3̇9H2O and sintered at low temperatures below 900°C, while the sintering at temperatures above 900°C leads to the paramagnetic behavior. X-ray diffraction analysis for the samples sintered at 500°C reveals that the single phase of β-Ga 2O3 can be obtained up to x=0.08 without traces of secondary phase or other impurity. Magnetization as a function of temperature shows superparamagnetic or cluster spin-glass behavior, indicating that long-range ferromagnetic ordering does not exist in the present systems. It is suggested that the inhomogeneous distribution of Fe3+ is responsible for the ferromagnetic behavior.

Original languageEnglish
Title of host publicationFabrication and New Applications of Nanomagnetic Structures
Pages21-26
Number of pages6
Publication statusPublished - Dec 1 2004
Event2004 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 29 2004Dec 3 2004

Publication series

NameMaterials Research Society Symposium Proceedings
Volume853
ISSN (Print)0272-9172

Other

Other2004 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period11/29/0412/3/04

Fingerprint

Ferromagnetism
Solid state reactions
Temperature
Spin glass
X ray diffraction analysis
Magnetization
Sintering
Impurities

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Hojo, H., Fujita, K., Tanaka, K., & Hirao, K. (2004). Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. In Fabrication and New Applications of Nanomagnetic Structures (pp. 21-26). (Materials Research Society Symposium Proceedings; Vol. 853).

Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. / Hojo, Hajime; Fujita, Koji; Tanaka, Katsuhisa; Hirao, Kazuyuki.

Fabrication and New Applications of Nanomagnetic Structures. 2004. p. 21-26 (Materials Research Society Symposium Proceedings; Vol. 853).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hojo, H, Fujita, K, Tanaka, K & Hirao, K 2004, Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. in Fabrication and New Applications of Nanomagnetic Structures. Materials Research Society Symposium Proceedings, vol. 853, pp. 21-26, 2004 MRS Fall Meeting, Boston, MA, United States, 11/29/04.
Hojo H, Fujita K, Tanaka K, Hirao K. Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. In Fabrication and New Applications of Nanomagnetic Structures. 2004. p. 21-26. (Materials Research Society Symposium Proceedings).
Hojo, Hajime ; Fujita, Koji ; Tanaka, Katsuhisa ; Hirao, Kazuyuki. / Ferromagnetism in Fe-doped β-Ga2O3 prepared by a solid state reaction. Fabrication and New Applications of Nanomagnetic Structures. 2004. pp. 21-26 (Materials Research Society Symposium Proceedings).
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