2004/04/30 by A. S. Risbud, Aditi Risbud, R. Seshadri +4
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Multiferroics and related materials #ZnO doping and properties #cond-mat.mtrl-sci
paper · pdf · doi:10.1088/0953-8984/17/6/018
published as J. Phys.: Condens. Matter 17 (2005) 1003-1010. · 9 pages and 6 figures
arxiv created 2004/09/08 · openalex publication_date 2005/01/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Solid 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. The magnetization as a function of field for the x = 0.15 sample is S-shaped at temperatures as high as 200 K. Mössbauer spectroscopy of the x = 0.15 sample confirms the presence of Fe 3+ , 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.