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Title: Optimization of the magnetocaloric effect in arrays of Ni 3Pt nanomagnets

Abstract

Structural parameters of nanomagnet arrays have been systematically adjusted in order to study and to maximize the magnetocaloric effect. Optimum technological parameters were experimentally established and arrays of nanomagnets based on Ni 3Pt nanoparticles with a different structure period (1, 2, 3μm) and two different heights (1.2 and 1.9μm) were fabricated using electron-beam lithography followed by electrodeposition. The obtained arrays have a phase composition of fcc-Ni 3Pt, which remains unchanged after annealing. It was shown that a change in the period of the nanomagnet arrays leads to a change in the magnitude of the magnetocaloric effect and the operating temperature range. Furthermore, changes in the height of nanomagnets from 1.2 to 1.9μm lead to an increase in the magnetocaloric response by more than 30%.

Authors:
 [1];  [2];  [2];  [3];  [2];  [2];  [2]
  1. P. J. Safarik Univ., Kosice (Slovakia); Sumy State Univ., Sumy (Ukraine)
  2. P. J. Safarik Univ., Kosice (Slovakia)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
Slovak Research and Development Agency (SRDA); USDOE
OSTI Identifier:
1490090
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Magnetism and Magnetic Materials
Additional Journal Information:
Journal Volume: 474; Journal Issue: C; Journal ID: ISSN 0304-8853
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Arrays of nanomagnets; Electrochemical deposition; Electron-beam lithography; Magnetocaloric effect

Citation Formats

Vorobiov, S., Tomasova, D., Girman, V., You, H., Čižmár, E., Orendáč, M., and Komanicky, Vladimir. Optimization of the magnetocaloric effect in arrays of Ni3Pt nanomagnets. United States: N. p., 2018. Web. doi:10.1016/j.jmmm.2018.10.137.
Vorobiov, S., Tomasova, D., Girman, V., You, H., Čižmár, E., Orendáč, M., & Komanicky, Vladimir. Optimization of the magnetocaloric effect in arrays of Ni3Pt nanomagnets. United States. doi:10.1016/j.jmmm.2018.10.137.
Vorobiov, S., Tomasova, D., Girman, V., You, H., Čižmár, E., Orendáč, M., and Komanicky, Vladimir. Tue . "Optimization of the magnetocaloric effect in arrays of Ni3Pt nanomagnets". United States. doi:10.1016/j.jmmm.2018.10.137.
@article{osti_1490090,
title = {Optimization of the magnetocaloric effect in arrays of Ni3Pt nanomagnets},
author = {Vorobiov, S. and Tomasova, D. and Girman, V. and You, H. and Čižmár, E. and Orendáč, M. and Komanicky, Vladimir},
abstractNote = {Structural parameters of nanomagnet arrays have been systematically adjusted in order to study and to maximize the magnetocaloric effect. Optimum technological parameters were experimentally established and arrays of nanomagnets based on Ni3Pt nanoparticles with a different structure period (1, 2, 3μm) and two different heights (1.2 and 1.9μm) were fabricated using electron-beam lithography followed by electrodeposition. The obtained arrays have a phase composition of fcc-Ni3Pt, which remains unchanged after annealing. It was shown that a change in the period of the nanomagnet arrays leads to a change in the magnitude of the magnetocaloric effect and the operating temperature range. Furthermore, changes in the height of nanomagnets from 1.2 to 1.9μm lead to an increase in the magnetocaloric response by more than 30%.},
doi = {10.1016/j.jmmm.2018.10.137},
journal = {Journal of Magnetism and Magnetic Materials},
issn = {0304-8853},
number = C,
volume = 474,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on October 30, 2019
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