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Title: Enhanced Néel Temperature in Mn Ferrite Nanoparticles Linked to Growth-Rate-Induced Cation Inversion

Abstract

Mn ferrite (MnFe2O4) nanoparticles, having diameters from 4 to 50 nm, were synthesized using a modified co-precipitation technique in which mixed metal chloride solutions were added to different concentrations of boiling NaOH solutions to control particle growth rate. Thermomagnetization measurements indicated an increase in Neel temperature corresponding to increased particle growth rate and particle size. The Neel temperature is also found to increase inversely proportionally to the cation inversion parameter, d, appearing in the formula (Mn1-dFed)tet[MndFe2-d]octO4. These results contradict previously published reports of trends between Neel temperature and particle size, and demonstrate the dominance of cation inversion in determining the strength of superexchange interactions and subsequently Neel temperature in ferrite systems. The particle surface chemistry, structure, and magnetic spin configuration play secondary roles.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
980192
Report Number(s):
BNL-93110-2010-JA
TRN: US201015%%1577
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Journal Article
Journal Name:
Nanotechnology
Additional Journal Information:
Journal Volume: 20
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; BOILING; CATIONS; CHEMISTRY; CHLORIDES; CONFIGURATION; FERRITE; PARTICLE SIZE; SPIN; NEEL TEMPERATURE; national synchrotron light source

Citation Formats

Yang, A, Chinnasamy, C, Greneche, J, Chen, Y, Yoon, S, Chen, Z, Hsu, K, Cai, Z, Ziemer, K, and et. al. Enhanced Néel Temperature in Mn Ferrite Nanoparticles Linked to Growth-Rate-Induced Cation Inversion. United States: N. p., 2009. Web. doi:10.1088/0957-4484/20/18/185704.
Yang, A, Chinnasamy, C, Greneche, J, Chen, Y, Yoon, S, Chen, Z, Hsu, K, Cai, Z, Ziemer, K, & et. al. Enhanced Néel Temperature in Mn Ferrite Nanoparticles Linked to Growth-Rate-Induced Cation Inversion. United States. https://doi.org/10.1088/0957-4484/20/18/185704
Yang, A, Chinnasamy, C, Greneche, J, Chen, Y, Yoon, S, Chen, Z, Hsu, K, Cai, Z, Ziemer, K, and et. al. 2009. "Enhanced Néel Temperature in Mn Ferrite Nanoparticles Linked to Growth-Rate-Induced Cation Inversion". United States. https://doi.org/10.1088/0957-4484/20/18/185704.
@article{osti_980192,
title = {Enhanced Néel Temperature in Mn Ferrite Nanoparticles Linked to Growth-Rate-Induced Cation Inversion},
author = {Yang, A and Chinnasamy, C and Greneche, J and Chen, Y and Yoon, S and Chen, Z and Hsu, K and Cai, Z and Ziemer, K and et. al.},
abstractNote = {Mn ferrite (MnFe2O4) nanoparticles, having diameters from 4 to 50 nm, were synthesized using a modified co-precipitation technique in which mixed metal chloride solutions were added to different concentrations of boiling NaOH solutions to control particle growth rate. Thermomagnetization measurements indicated an increase in Neel temperature corresponding to increased particle growth rate and particle size. The Neel temperature is also found to increase inversely proportionally to the cation inversion parameter, d, appearing in the formula (Mn1-dFed)tet[MndFe2-d]octO4. These results contradict previously published reports of trends between Neel temperature and particle size, and demonstrate the dominance of cation inversion in determining the strength of superexchange interactions and subsequently Neel temperature in ferrite systems. The particle surface chemistry, structure, and magnetic spin configuration play secondary roles.},
doi = {10.1088/0957-4484/20/18/185704},
url = {https://www.osti.gov/biblio/980192}, journal = {Nanotechnology},
number = ,
volume = 20,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2009},
month = {Thu Jan 01 00:00:00 EST 2009}
}