Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session G60: Poster Session I
2:00 PM,
Tuesday, March 6, 2018
LACC
Room: West Hall A
Abstract ID: BAPS.2018.MAR.G60.113
Abstract: G60.00113 : Curie Temperature Dependence on Chemical Ordering in FePt and CoPt Nanoparticle*
Presenter:
Frank Abel
(Physics and Astronomy , University of Delaware)
Authors:
Frank Abel
(Physics and Astronomy , University of Delaware)
Onur Tosun
(Physics and Astronomy , University of Delaware)
Vasileios tzitzios
(Department of Chemical Engineering, Khalifa University of Science and Technology)
Ralph Skomski
(Physics and Astronomy, University of Nebraska)
David Sellmyer
(Physics and Astronomy, University of Nebraska)
George Hadjipanayis
(Physics and Astronomy , University of Delaware)
In our work, we report the Curie temperature dependence on chemical ordering in FePt and CoPt nanoparticles. CoPt nanoparticles show a linear relationship between the chemical ordering and Curie temperature, going from 948 K in a disordered sample to 727 K in an ordered L10 sample. FePt showed an opposite behavior with the Curie temperature increasing from 600 K for a disordered sample to 740 K for an ordered L10 sample. The origin of these findings is believed to be related to the change in exchange interactions that occur when the atoms are re-arranged in the lattice transforming from disordered to ordered structures. Current efforts are focused on modeling of the experimental data.
[1] G. Ju et al., IEEE Trans. Magn. 51, 3201709 (2015)
*DOE: DE-FG02-04ER46152 and DE-FG02-90ER45413
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.G60.113
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