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Large tunability of Néel temperature by growth-rate-induced cation inversion in Mn-ferrite nanoparticles
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10.1063/1.3099340
/content/aip/journal/apl/94/11/10.1063/1.3099340
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/11/10.1063/1.3099340

Figures

Image of FIG. 1.
FIG. 1.

(a) Thermomagnetic data with best fit from MFT approximation for the 50 nm sample. Data were collected under the application of a 1000 Oe magnetic field. (b) The Néel temperatures determined by MFT fitting of thermomagnetic data plotted against average NP diameters. The inset is a plot of the Néel temperatures as a function of lattice parameter.

Image of FIG. 2.
FIG. 2.

(a) Real part of the Fourier transformed Fe and Mn edge EXAFS data with best fit data for 7.5 nm diameter Mn-ferrite NP sample. (b) Fe edge XANES data with best linear combination fit for the same sample.

Image of FIG. 3.
FIG. 3.

Néel temperature vs inversion parameter as described by and molar concentration of NaOH solution used in chemical processing of NPs. Error bars, plotted on the inversion parameters and Néel temperatures, reflect the uncertainty in the measurements and modeling analyses. The measured particle diameters for each sample are denoted aside each data point.

Tables

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Table I.

Short-range structure properties determined from EXAFS analyses of Mn-ferrite NP samples. The uncertainty in the least significant digit is included in parenthesis.

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/content/aip/journal/apl/94/11/10.1063/1.3099340
2009-03-18
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Large tunability of Néel temperature by growth-rate-induced cation inversion in Mn-ferrite nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/11/10.1063/1.3099340
10.1063/1.3099340
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