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Sol-gel deposited (010) textured polycrystalline thin films of gallium ferrite (GaFeO3 or GFO) on n-Si(100) and Pt/Si(111) substrates are characterized for room temperature multiferroism. Structural characterization using X-ray diffraction and Raman
Externí odkaz:
http://arxiv.org/abs/1611.01128
Autor:
Mukherjee, Somdutta, Roy, Amritendu, Auluck, Sushil, Prasad, Rajendra, Gupta, Rajeev, Garg, Ashish
Publikováno v:
Phys. Rev. Lett., 111, 087601 (2013)
We demonstrate room temperature ferroelectricity in the epitaxial thin films of magnetoelectric GaFeO3. Piezo-force measurements show a 180o phase shift of piezoresponse upon switching the electric field indicating nanoscale ferroelectricity in epita
Externí odkaz:
http://arxiv.org/abs/1302.3983
Autor:
Roy, Amritendu, Mukherjee, Somdutta, Sarkar, Surajit, Auluck, Sushil, Prasad, Rajendra, Gupta, Rajeev, Garg, Ashish
Publikováno v:
J. Phys.: Condens. Matter 24 (2012) 435501
We present a combined experimental-theoretical study demonstrating the role of site disorder, off-stoichiometry and strain on the optical behavior of magnetoelectric gallium ferrite. Optical properties such as band-gap, refractive indices and dielect
Externí odkaz:
http://arxiv.org/abs/1210.0356
Publikováno v:
Applied Physics Letters, 100, 112904 (2012)
In this letter we show the presence of a spin-glass like phase in single crystals of magnetoelectric gallium ferrite (GaFeO3) below ~210 K via temperature dependent ac and dc magnetization studies. Analysis of frequency dispersion of the susceptibili
Externí odkaz:
http://arxiv.org/abs/1204.2973
Publikováno v:
Solid State Communications, 152, 1181-1185 (2012)
We show the effect of composition on structural and magnetic characteristics of pure phase polycrystalline Ga<2-x>FeO<3> (GFO) for compositions between 0.8 <= x <= 1.3. X-ray analysis reveals that lattice parameters of GFO exhibit a linear depende
Externí odkaz:
http://arxiv.org/abs/1107.3623
Publikováno v:
J. Phys.: Condens. Matter 23 (2011) 445403
Temperature dependent X-ray diffraction and Raman spectroscopic studies were carried out on the flux grown single crystals of gallium ferrite with Ga:Fe ratio of 0.9:1.1. Site occupancy calculations from the Rietveld refinement of the X-ray data led
Externí odkaz:
http://arxiv.org/abs/1103.5541
Autor:
Roy, Amritendu, Mukherjee, Somdutta, Gupta, Rajeev, Prasad, Rajendra, Auluck, Sushil, Garg, Ashish
Publikováno v:
Journal of Physics: Condensed Matter, Volume 23, 325902 (2011) (9 pages)
We present a theoretical study of the structure-property correlation in gallium ferrite, based on the first principles calculations followed by a subsequent comparison with the experiments. Local spin density approximation (LSDA+U) of the density fun
Externí odkaz:
http://arxiv.org/abs/1103.4935
Publikováno v:
In Journal of Alloys and Compounds 15 October 2017 721:593-599
Publikováno v:
In Journal of Magnetism and Magnetic Materials 1 February 2015 375:49-53