Magnetic, dielectric and photo-absorption study of a ferromagnetic semiconductor α-Fe1.4Ga0.6O3
作者： N. Naresh , R. N. Bhowmik
DOI: 10.1063/1.3624734
关键词:
摘要: We report the synthesis of α-Fe1.4Ga0.6O3 compound and present its structural phase stability interesting magnetic, dielectric photo-absorption properties. In our work Ga doped α-Fe2O3 samples are well stabilized in α (rhombohedral crystal structure with space group R3C). Properties composition system remarkably advanced comparison recently most studied FeGaO3 composition. At room temperature typical soft ferromagnet, as direct band gapsemiconductor. Dielectric study showed low loss large enhancement ac conductivity at higher frequencies. Optical absorption visible range has been enhanced by 4 to 5%. This exhibited scope tailoring temperatureferromagnetic moment optical gap varying grain size non-ambient (vacuum) heat treatment prepared mechanical alloying.
scitation.org
harvard.edu
aip.org
sci-hub.se 参考文章(51)
R. N. Bhowmik, A. Saravanan, Surface magnetism, Morin transition, and magnetic dynamics in antiferromagnetic α-Fe2O3 (hematite) nanograins Journal of Applied Physics. ,vol. 107, pp. 053916- ,(2010) , 10.1063/1.3327433
R. N. Bhowmik, Asok Poddar, R. Ranganathan, Chandan Mazumdar, Magnetism of crystalline and amorphous La0.67Ca0.33MnO3 nanoparticles Journal of Applied Physics. ,vol. 105, pp. 113909- ,(2009) , 10.1063/1.3138814
T. David Waite, David M. Sherman, Electronic spectra of Fe3+ oxides and oxide hydroxides in the near IR to near UV American Mineralogist. ,vol. 70, pp. 1262- 1269 ,(1985)
K.F. Wang, J.-M. Liu, Z.F. Ren, Multiferroicity: the coupling between magnetic and polarization orders Advances in Physics. ,vol. 58, pp. 321- 448 ,(2009) , 10.1080/00018730902920554
Rossitza Pentcheva, Hasan Sadat Nabi, Interface magnetism in Fe 2 O 3 /FeTiO 3 heterostructures Physical Review B. ,vol. 77, pp. 172405- ,(2008) , 10.1103/PHYSREVB.77.172405
Jose Manuel Gallardo Amores, Vicente Sanchez Escribano, Guido Busca, Enrique Fernandez Lopez, Mohamed Saidi, Solid state chemistry of Fe–Ga mixed oxides Journal of Materials Chemistry. ,vol. 11, pp. 3234- 3240 ,(2001) , 10.1039/B103523C
M. Fiebig, N. A. Spaldin, Current trends of the magnetoelectric effect European Physical Journal B. ,vol. 71, pp. 293- 297 ,(2009) , 10.1140/EPJB/E2009-00266-4
Y. Takada, M. Nakanishi, T. Fujii, J. Takada, Y. Muraoka, Preparation and characterization of epitaxial Fe2−xTixO3 films with various Ti concentrations (0.5<x<1.0) Journal of Applied Physics. ,vol. 104, pp. 033713- ,(2008) , 10.1063/1.2966298
K.K Patankar, V.L Mathe, R.P Mahajan, S.A Patil, Ram Manohar Reddy, K.V SivaKumar, Dielectric behaviour and magnetoelectric effect in CuFe2O4–Ba0.8Pb0.2TiO3 composites Materials Chemistry and Physics. ,vol. 72, pp. 23- 29 ,(2001) , 10.1016/S0254-0584(01)00307-8