Campus Units

Chemical and Biological Engineering, Materials Science and Engineering, Physics and Astronomy, Ames Laboratory

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

11-2019

Journal or Book Title

Acta Materialia

Volume

180

First Page

341

Last Page

348

DOI

10.1016/j.actamat.2019.09.023

Abstract

The coupling between structural and magnetic degrees of freedom is crucial for realization of interesting physical phenomena associated with magneto-structural transformations resembling austenite-to-martensite transitions. Despite substantial efforts in design and discovery of materials with strong magnetocaloric effects, majority of viable candidates are composed of non-earth-abundant and toxic elements, while others involve challenging syntheses and post processing. Guided by advanced density functional theory calculation, we report a new family of compounds, i.e., Mn0.5Fe0.5NiSi1-xAlx [x = 0.045–0.07] exhibiting a giant magnetocaloric effect (MCE) that is tunable near room temperature. Their MCE functionality arises from a distinct magneto-structural transformation between a paramagnetic hexagonal Ni2In-type phase and ferromagnetic orthorhombic TiNiSi-type phase that can be actuated by magnetic field and/or pressure. As the transition is sensitive to external hydrostatic pressure, the same materials should also exhibit a strong barocaloric response in addition to the giant MCE.

Comments

This is a manuscript of an article published as Biswas, Anis, Arjun K. Pathak, Nikolai A. Zarkevich, Xubo Liu, Yaroslav Mudryk, Viktor Balema, Duane D. Johnson, and Vitalij K. Pecharsky. "Designed materials with the giant magnetocaloric effect near room temperature." Acta Materialia 180 (2019): 341-348. DOI: 10.1016/j.actamat.2019.09.023. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Acta Materialia Inc.

Language

en

File Format

application/pdf

Available for download on Monday, September 20, 2021

Published Version

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