Dilute ferrimagnetic semiconductors in Fe-substituted spinel ZnGa$_2$O$_4$

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dc.creatorRisbud, A. S.
dc.creatorSeshadri, R.
dc.creatorEnsling, J.
dc.creatorFelser, C.
dc.date2004-04-06
dc.date2004-09-08
dc.date.accessioned2026-07-07T02:57:29Z
dc.date.available2026-07-07T02:57:29Z
dc.descriptionSolid solutions of nominal composition [ZnGa$_2$O$_4$]$_{1-x}$[Fe$_3$O$_4$]$_x$, of the semiconducting spinel ZnGa$_2$O$_4$ with the ferrimagnetic spinel Fe$_3$O$_4$ 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. Magnetization as a function of field for the $x$ = 0.15 sample is S-shaped at temperatures as high as 200 K. Mössbauer spectroscopy on the $x$ = 0.15 sample confirms the presence of Fe$^{3+}$, and spontaneous magnetization at 4.2 K. The magnetic behavior 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 the possibility of dilute ferrimagnetic semiconductors which do not require carrier mediation of the magnetic moment.
dc.description9 pages and 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0404147
dc.identifierhttp://arxiv.org/abs/cond-mat/0404147
dc.identifierJ. Phys.: Condens. Matter 17 (2005) 1003-1010.
dc.identifierdoi:10.1088/0953-8984/17/6/018
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23685
dc.subjectMaterials Science
dc.titleDilute ferrimagnetic semiconductors in Fe-substituted spinel ZnGa$_2$O$_4$
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