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Spin canting in ferrite nanoparticles

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Abstract

Recently, an easily scalable process for the production of small (3 −7 nm) monodisperse superparamagnetic ferrite nanoparticles MeFe2O4 (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 (Zn0.19Fe0.81)A[Zn0.81Fe1.19] BO4, (Mn0.15Fe0.85)A[Mn0.85Fe1.15] BO4 and (Co0.27Fe0.73)A[Co0.73Fe1.27] BO4. 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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Correspondence to J. Marx.

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This article is part of the Topical Collection on Proceedings of the International Conference on the Applications of the Mössbauer Effect (ICAME 2015), Hamburg, Germany, 13–18 September 2015

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Marx, J., Huang, H., M. Salih, K.S. et al. Spin canting in ferrite nanoparticles. Hyperfine Interact 237, 41 (2016). https://doi.org/10.1007/s10751-016-1241-5

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