Moorsom, T, Alghamdi, S, Stansill, S et al. (9 more authors) (Cover date: 01/02/2020) π-anisotropy: A nanocarbon route to hard magnetism. Physical Review B, 101 (6). 060408. ISSN 2469-9950
Abstract
High coercivity magnets are an important resource for renewable energy, electric vehicles, and memory technologies. Most hard magnetic materials incorporate rare earths such as neodymium and samarium, but concerns about the environmental impact and supply stability of these materials are prompting research into alternatives. Here, we present a hybrid bilayer of cobalt and the nanocarbon molecule C60 which exhibits significantly enhanced coercivity with minimal reduction in magnetization. We demonstrate how this anisotropy enhancing effect cannot be described by existing models of molecule-metal magnetic interfaces. We outline a form of anisotropy, arising from asymmetric magnetoelectric coupling in the metal-molecule interface. Because this phenomenon arises from π−d hybrid orbitals, we propose calling this effect π-anisotropy. While the critical temperature of this effect is currently limited by the rotational degree of freedom of the chosen molecule, C60, we describe how surface functionalization would allow for the design of room-temperature, carbon-based hard magnetic films.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2020 American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/M000923/1 EPSRC (Engineering and Physical Sciences Research Council) EP/K00512X/1 EPSRC (Engineering and Physical Sciences Research Council) EP/J021156/1 EPSRC (Engineering and Physical Sciences Research Council) EP/K036408/1 EPSRC (Engineering and Physical Sciences Research Council) EP/S030263/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 06 May 2020 12:40 |
Last Modified: | 25 Jun 2023 22:13 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/physrevb.101.060408 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:159509 |