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Journal article
Magnetic properties of (Fe1-xMnx)(2)AlB2 and the impact of substitution on the magnetocaloric effect
Physical review materials, v 4(8)
06 Aug 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this work, we investigate the magnetic structures of (Fe1-xMnx)(2)AlB2 solid-solution quaternaries in the x = 0 to 1 range using x-ray and neutron diffraction, magnetization measurements, and mean-field theory calculations. While Fe2AlB2 and Mn2AlB2 are known to be ferromagnetic (FM) and antiferromagnetic (AFM), respectively, herein we focused on the magnetic structure of their solid solutions, which is not well understood. The FM ground state of Fe2AlB2 becomes a canted AFM at x approximate to 0.2, with a monotonically diminishing FM component until x approximate to 0.5. The FM transition temperature (TC) decreases linearly with increasing x. These changes in magnetic moments and structures are reflected in anomalous expansions of the lattice parameters, indicating a magnetoelastic coupling. Lastly, the magnetocaloric properties of the solid solutions were explored. For x = 0.2 the isothermal entropy change is smaller by 30% than it is for Fe2AlB2, while the relative cooling power is larger by 6%, due to broadening of the temperature range of the transition.
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Details
- Title
- Magnetic properties of (Fe1-xMnx)(2)AlB2 and the impact of substitution on the magnetocaloric effect
- Creators
- D. Potashnikov - Technion – Israel Institute of TechnologyE. N. Caspi - Drexel UniversityA. Pesach - Department of Physics, Nuclear Research Centre-Negev, P.O. Box 9001, Beer Sheva 84190, IsraelS. Kota - Drexel UniversityM. Sokol - Drexel UniversityL. A. Hanner - Drexel UniversityM. W. Barsoum - Drexel UniversityH. A. Evans - NIST Center for Neutron ResearchA. Eyal - Technion – Israel Institute of TechnologyA. Keren - Technion – Israel Institute of TechnologyO. Rivin - Department of Physics, Nuclear Research Centre-Negev, P.O. Box 9001, Beer Sheva 84190, Israel
- Publication Details
- Physical review materials, v 4(8)
- Publisher
- Amer Physical Soc
- Number of pages
- 9
- Grant note
- KAW 2015.0043 / Knut and Alice Wallenberg Foundation; Knut & Alice Wallenberg Foundation National Research Council (USA) Israel Atomic Energy Commission Pazy Foundation Grant
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000557900400002
- Scopus ID
- 2-s2.0-85092140171
- Other Identifier
- 991019168665704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary