Dilute ferrimagnetic semiconductors in Fe-substituted spinel ZnGa2O4

Risbud, A.S.; Seshadri, R.; Ensling, J.; Felser, C.

doi:10.1088/0953-8984/17/6/018

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Dilute ferrimagnetic semiconductors in Fe-substituted spinel ZnGa₂O₄

MPS-Authors

There are no MPG-Authors in the publication available

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Risbud, A., Seshadri, R., Ensling, J., & Felser, C. (2005). Dilute ferrimagnetic semiconductors in Fe-substituted spinel ZnGa₂O₄. Journal of Physics: Condensed Matter, 17(6), 1003-1010. doi:10.1088/0953-8984/17/6/018.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-61EC-1

Abstract

Solid solutions of nominal composition [ZnGa2O4](1-x)[Fe3O4](x), of the semiconducting spinel ZnGa2O4 with the ferrimagnetic spinel Fe3O4, have been prepared with x = 0.05, 0.10, and 0.15. All samples show evidence for long range magnetic ordering with ferromagnetic hysteresis at low temperatures. The magnetization as a function of field for the x = 0.15 sample is S-shaped at temperatures as high as 200 K. Mossbauer spectroscopy of the x = 0.15 sample confirms the presence of Fe3+, and spontaneous magnetization at 4.2 K. The magnetic behaviour is obtained without greatly affecting the semiconducting properties of the host; diffuse reflectance optical spectroscopy indicates that Fe substitution up to x = 0.15 does not affect the position of the band edge absorption. These promising results motivate us to suggest the possibility of dilute ferrimagnetic semiconductors which do not require carrier mediation of the magnetic moment.