English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)3-δO4 nanoparticles

Weidenthaler, C., Antic, B., Kremenovic, A., Pavlovic, M., Jovalekic, C., Nikolic, A., et al. (2012). Magnetization enhancement and cation valences in nonstoichiometric (Mn,Fe)3-δO4 nanoparticles. JOURNAL OF APPLIED PHYSICS, 111(7), 074309. doi:10.1063/1.3700228.

Item is

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Weidenthaler, Claudia1, Author           
Antic, B.2, Author
Kremenovic, A.3, Author
Pavlovic, M.B4, Author
Jovalekic, C.5, Author
Nikolic, A.S.6, Author
Goya, G.F.7, 8, Author
Affiliations:
1Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
2Univ Belgrade, Vinca Inst Nucl Sci, Belgrade 11001, Serbia, ou_persistent22              
3Univ Belgrade, Fac Min & Geol, Crystallog Lab , Belgrade 11001, Serbia , ou_persistent22              
4Univ Belgrade, Fac Elect Engn, Belgrade 11000, Serbia, ou_persistent22              
5Univ Belgrade, InsituteMultidisciplinary Studies , Belgrade 11001, Serbia, ou_persistent22              
6Univ Belgrade, Fac Chem, Belgrade 11000, Serbia, ou_persistent22              
7Univ Zaragoza, Inst Nanociencia Aragon, Zaragoza, Spain, ou_persistent22              
8Univ Zaragoza, Dept Fis Mat Condensada , Zaragoza, Spain, ou_persistent22              

Content

show
hide
Free keywords: XPS SPECTRA; MOSSBAUER; PARTICLES; FERRITE; MN; FE
 Abstract: We present a study of the structural and magnetic properties of (Mn,Fe)3-δO4 nanoparticles synthesized by soft mechanochemistry using Mn(OH)2 × 2 H2O and Fe(OH)3 powders as starting compounds. The resulting nanoparticles with a composition of the (Mn,Fe)3-δO4 type are found to have a core/shell structure with different Mn/Fe ratios in the core and at the surface. XPS analysis points to valences of +2, +3, and +4 for Mn and +3 for Fe at the particle surface. Combined results of XRPD, Mössbauer spectroscopy, and EDX analysis suggest that there is a deviation from stoichiometry in the nanoparticle core compared to the shell, accompanied by creation of cation polyvalence and vacancies. The value of saturation magnetization, MS, of 73.5 emu/g at room temperature, is among the highest reported so far among nanocrystalline ferrite systems of similar composition.

Details

show
hide
Language(s):
 Dates: 2012-04-01
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1063/1.3700228
ISSN: 0021-8979
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: JOURNAL OF APPLIED PHYSICS
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 111 (7) Sequence Number: - Start / End Page: 074309 Identifier: -