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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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Publications (38/38 displayed)

  • 2019Tuning electrical and thermoelectric properties of freestanding graphene oxide papers by carbon nanotubes and heat treatment14citations
  • 2017Bipolar resistive switching in Si/Ag nanostructures16citations
  • 2017Unipolar Nonvolatile Resistive Switching in Pt/MgO/Ta/Ru Structures Deposited by Magnetron Sputtering8citations
  • 2017Facile synthesis of well dispersed Pd nanoparticles on reduced graphene oxide for electrocatalytic oxidation of formic acid28citations
  • 2017Positron annihilation lifetime, cation distribution and magnetic features of Ni1-xZnxFe2-xCoxO4 ferrite nanoparticles39citations
  • 2017Tailoring Bi-Te based nanomaterials by electrodeposition: Morphology and crystalline structure12citations
  • 2016Thin film versus paper-like reduced graphene oxide: Comparative study of structural, electrical, and thermoelectrical properties18citations
  • 2016Facile synthesis of reduced graphene oxide supported Pd@NixB/RGO nanocomposite: Novel electrocatalyst for ethanol oxidation in alkaline media27citations
  • 2016Electrodeposition of ZnO thin films on conducting flexible substrates23citations
  • 2016Green and facile decoration of Fe3O4 nanoparticles on reduced graphene oxide16citations
  • 2016Facile synthesis of Co/RGO nanocomposite for methylene blue dye removal13citations
  • 2016Tuning the Stoichiometry of Ag2S Thin Films for Resistive Switching Applications3citations
  • 2016Femtosecond control of electric currents in metallic ferromagnetic heterostructures224citations
  • 2016Novel synthesis of highly catalytic active Cu@Ni/RGO nanocomposite for efficient hydrogenation of 4-nitrophenol organic pollutant61citations
  • 2016Reduced graphene oxide-nickel nanoparticles/biopolymer composite films for the sub-millimolar detection of glucose13citations
  • 2016Facile synthesis of novel Co-B@Ni/RGO nanocomposite: A cost effective catalyst for improved hydrogen generation with enhanced electrochemical activity24citations
  • 2015Synthesis, structural and magnetic characterization of lead-metaniobate/cobalt-ferrite nanocomposite films deposited by pulsed laser ablation3citations
  • 2015Novel synthesis of Ag@Co/RGO nanocomposite and its high catalytic activity towards hydrogenation of 4-nitrophenol to 4-aminophenol64citations
  • 2015Reduction of 4-nitrophenol to 4-aminophenol using a novel Pd@NixB-SiO2/RGO nanocomposite: enhanced hydrogen spillover and high catalytic performance25citations
  • 2015Synthesis of Ni(OH)(2)@Ni/RGO nanocomposite: formulation of one dimensional array2citations
  • 2015Unusual extraction and characterization of nanocrystalline cellulose from cellulose derivatives34citations
  • 2015Drastic modification of graphene oxide properties by incorporation of nickel: a simple inorganic chemistry approach1citations
  • 2015Synthesis and characterization of Graphene/Nickel nanocomposites:The role of reducing agent on nanoparticle size and morphologycitations
  • 2014Ultra-long Fe nanowires by pulsed electrodeposition with full filling of alumina templates27citations
  • 2013Correlations among magnetic, electrical and magneto-transport properties of NiFe nanohole arrays10citations
  • 2013Conductivity enhancement and resistance changes in polymer films filled with reduced graphene oxide9citations
  • 2013Influence of Process Parameters on the RF Sputtered GaP Thin Films3citations
  • 2013Electrical conductivity of LTA-zeolite in the presence of poly(vinyl alcohol) and poly(vinyl pyrrolidone) polymers5citations
  • 2012Precise control of the filling stages in branched nanopores29citations
  • 2011The influence of argon pressure and RF power on the growth of InP thin films9citations
  • 2011Tunning pore filling of anodic alumina templates by accurate control of the bottom barrier layer thickness65citations
  • 2011Resonant Tunneling through Electronic Trapping States in Thin MgO Magnetic Junctions49citations
  • 2010High-Field Magnetoresistance of La0.67Sr0.33MnO3 Thin Films Deposited on LiNbO3 Substrates2citations
  • 2010Novel Layer-by-Layer Interfacial [Ni(salen)]-Polyelectrolyte Hybrid Films22citations
  • 2009The effect of pinhole formation/growth on the tunnel magnetoresistance of MgO-based magnetic tunnel junctions24citations
  • 2009Electroforming, magnetic and resistive switching in MgO-based tunnel junctions36citations
  • 2008Structural, magnetic and transport properties of ion beam deposited Co thin films15citations
  • 2004Peculiar magnetic and electrical properties near structural percolation in metal-insulator granular layers20citations

Places of action

Chart of shared publication
Goncalves, Lmv
1 / 1 shared
Vieira, Emf
1 / 4 shared
Okhay, O.
5 / 11 shared
Tkach, A.
3 / 29 shared
Goncalves, G.
3 / 8 shared
Dias, C.
12 / 14 shared
Lv, H.
2 / 3 shared
Freitas, Pp
7 / 7 shared
Cardoso, S.
4 / 10 shared
Aguiar, P.
1 / 1 shared
Picos, R.
1 / 3 shared
Pereira, J.
1 / 8 shared
Guerra, Lm
3 / 3 shared
Krishna, R.
13 / 21 shared
Freire, C.
9 / 21 shared
Fernandes, Dm
7 / 32 shared
Titus, E.
15 / 19 shared
Marinoiu, A.
1 / 1 shared
Asgarian, Sm
1 / 1 shared
Nikmanesh, H.
1 / 1 shared
Kameli, P.
1 / 3 shared
Moradi, M.
1 / 5 shared
Salamati, H.
1 / 3 shared
Karimi, S.
1 / 3 shared
Bordalo, B.
1 / 1 shared
Kargar, Z.
1 / 1 shared
Proenca, Mp
4 / 8 shared
Fernandes, L.
2 / 7 shared
Tavares, Pb
2 / 26 shared
Araujo, Jp
15 / 91 shared
Pereira, Am
4 / 35 shared
Sousa, Ct
5 / 14 shared
Rosmaninho, M.
1 / 1 shared
Resende, Pm
1 / 2 shared
Valente Goncalves, Lmv
1 / 1 shared
Ribeiro Da Silva, Mfr
1 / 1 shared
Oliveira, Ff
1 / 1 shared
Agostinho Moreira, Ja
1 / 29 shared
Vilarinho, R.
1 / 10 shared
Kimel, Av
1 / 2 shared
Mikhaylovskiy, Rv
1 / 2 shared
Mokrousov, Y.
1 / 9 shared
Huisman, Tj
1 / 2 shared
Costa, Jd
1 / 1 shared
Bluegel, S.
1 / 2 shared
Paz, E.
1 / 3 shared
Freimuth, F.
1 / 4 shared
Rasing, T.
1 / 2 shared
Campina, Jm
1 / 6 shared
Silva, Af
1 / 7 shared
Fernandes, Pmv
1 / 2 shared
Barbosa, J.
2 / 59 shared
Mendes, Ja
1 / 7 shared
Sa, P.
1 / 1 shared
Gomes, It
2 / 9 shared
Almeida, Bg
2 / 13 shared
Ramana, Ev
1 / 1 shared
Domingos, Vf
1 / 1 shared
Ribeiro, Es
1 / 1 shared
Gil, Jc
1 / 1 shared
Antunes, Fe
1 / 2 shared
Romano, A.
1 / 5 shared
Fernandez Garcia, Mp
1 / 3 shared
Lindman, B.
1 / 4 shared
Alves, L.
1 / 2 shared
Medronho, B.
1 / 2 shared
Klaeui, M.
1 / 2 shared
Gracio, Jja
1 / 2 shared
Ferro, M.
1 / 4 shared
Salimian, M.
3 / 5 shared
Bdkin, I.
1 / 2 shared
Francis, Ld
1 / 1 shared
Apolinario, A.
3 / 8 shared
Azevedo, J.
1 / 7 shared
Mendes, A.
1 / 22 shared
De Teresa, Jm
1 / 4 shared
Leitao, Dc
4 / 6 shared
Sousa, Jb
6 / 16 shared
Michalik, Jm
1 / 1 shared
Pinto, S.
1 / 5 shared
Teixeira, Jm
6 / 8 shared
Vazquez, M.
1 / 5 shared
Gracio, J.
2 / 19 shared
Mota, Da
1 / 3 shared
Perez De La Cruz, Jp
2 / 8 shared
Hema Chandra, Gh
1 / 1 shared
Guedes, A.
1 / 26 shared
Khairnar, Rs
1 / 1 shared
Pereira, C.
1 / 55 shared
Babu, Pr
1 / 1 shared
Guerra, L.
1 / 2 shared
Chandra, Gh
1 / 1 shared
Correia, Jg
1 / 7 shared
Wisniowski, P.
3 / 3 shared
Carpinteiro, F.
3 / 4 shared
Moreira, Jm
1 / 3 shared
Moura, C.
1 / 27 shared
Biernacki, K.
1 / 3 shared
Magalhaes, Al
1 / 6 shared
Eaton, P.
1 / 8 shared
Hillman, Ar
1 / 16 shared
Cruz, Ai
1 / 1 shared
Patricio, S.
1 / 3 shared
Fermento, R.
2 / 2 shared
Pogorelov, Yg
1 / 10 shared
Santos, Jam
1 / 1 shared
Silva, Rfa
1 / 1 shared
Snoeck, E.
1 / 12 shared
Kakazei, Gn
1 / 8 shared
Chart of publication period
2019
2017
2016
2015
2014
2013
2012
2011
2010
2009
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2004

Co-Authors (by relevance)

  • Goncalves, Lmv
  • Vieira, Emf
  • Okhay, O.
  • Tkach, A.
  • Goncalves, G.
  • Dias, C.
  • Lv, H.
  • Freitas, Pp
  • Cardoso, S.
  • Aguiar, P.
  • Picos, R.
  • Pereira, J.
  • Guerra, Lm
  • Krishna, R.
  • Freire, C.
  • Fernandes, Dm
  • Titus, E.
  • Marinoiu, A.
  • Asgarian, Sm
  • Nikmanesh, H.
  • Kameli, P.
  • Moradi, M.
  • Salamati, H.
  • Karimi, S.
  • Bordalo, B.
  • Kargar, Z.
  • Proenca, Mp
  • Fernandes, L.
  • Tavares, Pb
  • Araujo, Jp
  • Pereira, Am
  • Sousa, Ct
  • Rosmaninho, M.
  • Resende, Pm
  • Valente Goncalves, Lmv
  • Ribeiro Da Silva, Mfr
  • Oliveira, Ff
  • Agostinho Moreira, Ja
  • Vilarinho, R.
  • Kimel, Av
  • Mikhaylovskiy, Rv
  • Mokrousov, Y.
  • Huisman, Tj
  • Costa, Jd
  • Bluegel, S.
  • Paz, E.
  • Freimuth, F.
  • Rasing, T.
  • Campina, Jm
  • Silva, Af
  • Fernandes, Pmv
  • Barbosa, J.
  • Mendes, Ja
  • Sa, P.
  • Gomes, It
  • Almeida, Bg
  • Ramana, Ev
  • Domingos, Vf
  • Ribeiro, Es
  • Gil, Jc
  • Antunes, Fe
  • Romano, A.
  • Fernandez Garcia, Mp
  • Lindman, B.
  • Alves, L.
  • Medronho, B.
  • Klaeui, M.
  • Gracio, Jja
  • Ferro, M.
  • Salimian, M.
  • Bdkin, I.
  • Francis, Ld
  • Apolinario, A.
  • Azevedo, J.
  • Mendes, A.
  • De Teresa, Jm
  • Leitao, Dc
  • Sousa, Jb
  • Michalik, Jm
  • Pinto, S.
  • Teixeira, Jm
  • Vazquez, M.
  • Gracio, J.
  • Mota, Da
  • Perez De La Cruz, Jp
  • Hema Chandra, Gh
  • Guedes, A.
  • Khairnar, Rs
  • Pereira, C.
  • Babu, Pr
  • Guerra, L.
  • Chandra, Gh
  • Correia, Jg
  • Wisniowski, P.
  • Carpinteiro, F.
  • Moreira, Jm
  • Moura, C.
  • Biernacki, K.
  • Magalhaes, Al
  • Eaton, P.
  • Hillman, Ar
  • Cruz, Ai
  • Patricio, S.
  • Fermento, R.
  • Pogorelov, Yg
  • Santos, Jam
  • Silva, Rfa
  • Snoeck, E.
  • Kakazei, Gn
OrganizationsLocationPeople

article

Positron annihilation lifetime, cation distribution and magnetic features of Ni1-xZnxFe2-xCoxO4 ferrite nanoparticles

  • Asgarian, Sm
  • Nikmanesh, H.
  • Kameli, P.
  • Moradi, M.
  • Salamati, H.
  • Karimi, S.
  • Ventura, Joao
  • Bordalo, B.
  • Kargar, Z.
Abstract

A series of Zn and Co-substituted nickel ferrite nanoparticles of nominal composition Ni1-xZnxFe2-xCoxO4 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5) have been synthesized by the PVA assisted sol-gel method. The reported structural and magnetic properties of the samples were investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and vibrating sample magnetometry (VSM). Also, the effect of these substitutions on vacancy distribution is investigated with positron annihilation lifetime spectroscopy (PALS). The cation distribution is inferred from the X-ray diffraction using the MAUD program to investigate ion occupancy, the exact coordinates of the atoms and unit cell dimensions. XRD analysis using the Rietveld refinement technique proves the crystalline structure and the growth of pure, single-phase and nanosize substituted nickel ferrite. These results are confirmed by the performed FESEM and FTIR studies. Magnetic measurements revealed that the values of the saturation magnetization (M-s) in the Ni1-xZnxFe2-xCoxO4 samples gradually increased for doping levels up to x = 0.4, then decreasing for further content. Also, the coercivity showed an overall decreasing trend with increasing doping. The positron lifetime spectra of the substituted nickel ferrite were decomposed into three-lifetime components, tau(1), tau(2), tau(3). First of all, tau(1), is depends on the positrons that do not get trapped by the vacancy defects. The second lifetime component, tau(2), is attributed to positrons annihilation in vacancy-type defects in ferrite nanoparticles. The final lifetime, tau(3), is due to the annihilation of positrons across nanoparticles in the free volume of ferrite structure. Also, magnetic behaviors could be explained by positron annihilation lifetime spectroscopy.

Topics
  • nanoparticle
  • impedance spectroscopy
  • nickel
  • phase
  • scanning electron microscopy
  • x-ray diffraction
  • positron annihilation lifetime spectroscopy
  • Fourier transform infrared spectroscopy
  • magnetization
  • saturation magnetization
  • vacancy
  • coercivity