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Spin canting in ferrite nanoparticles

Recently, an easily scalable process for the production of small (3 −7 nm) monodisperse superparamagnetic ferrite nanoparticles MeFe 2 O 4 (Me = Zn, Mn, Co) from iron metal and octanoic acid has been reported (Salih et al., Chem. Mater. 25 1430–1435 2013 ). Here we present a Mössbauer spectroscopic...

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Published in:Hyperfine interactions 2016-12, Vol.237 (1), p.1-8, Article 41
Main Authors: Marx, J., Huang, H., M. Salih, K. S., Thiel, W. R., Schünemann, V.
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container_title Hyperfine interactions
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description Recently, an easily scalable process for the production of small (3 −7 nm) monodisperse superparamagnetic ferrite nanoparticles MeFe 2 O 4 (Me = Zn, Mn, Co) from iron metal and octanoic acid has been reported (Salih et al., Chem. Mater. 25 1430–1435 2013 ). Here we present a Mössbauer spectroscopic study of these ferrite nanoparticles in external magnetic fields of up to B = 5 T at liquid helium temperatures. Our analysis shows that all three systems show a comparable inversion degree and the cationic distribution for the tetrahedral A and the octahedral B sites has been determined to (Zn 0.19 Fe 0.81 ) A [Zn 0.81 Fe 1.19 ] B O 4 , (Mn 0.15 Fe 0.85 ) A [Mn 0.85 Fe 1.15 ] B O 4 and (Co 0.27 Fe 0.73 ) A [Co 0.73 Fe 1.27 ] B O 4 . Spin canting occurs presumably in the B-sites and spin canting angles of 33°, 51° and 59° have been determined for the zinc, the manganese, and the cobalt ferrite nanoparticles.
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subjects 13-18 September 2015
Atomic
Cobalt ferrites
Condensed Matter Physics
Filing
Germany
Hadrons
Hamburg
Heavy Ions
Helium
Liquid helium
Manganese
Molecular
Nanoparticles
Nuclear Physics
Octanoic acid
Optical and Plasma Physics
Physics
Physics and Astronomy
Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2015)
Surfaces and Interfaces
Thin Films
Zinc
title Spin canting in ferrite nanoparticles
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