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Dupuis V, Robert A, Hillion A, Khadra G, Blanc N, Le Roy D, Tournus F, Albin C, Boisron O, Tamion A. Cubic chemically ordered FeRh and FeCo nanomagnets prepared by mass-selected low-energy cluster-beam deposition: a comparative study. Beilstein J Nanotechnol 2016; 7:1850-1860. [PMID: 28144534 PMCID: PMC5238643 DOI: 10.3762/bjnano.7.177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Accepted: 11/10/2016] [Indexed: 06/06/2023]
Abstract
Near the point of equiatomic composition, both FeRh and FeCo bulk alloys exhibit a CsCl-type (B2) chemically ordered phase that is related to specific magnetic properties, namely a metamagnetic anti-ferromagnetic/ferromagnetic transition near room temperature for FeRh and a huge magnetic moment for the FeCo soft alloy. In this paper, we present the magnetic and structural properties of nanoparticles of less than 5 nm diameter embedded in an inert carbon matrix prepared by mass-selected low-energy cluster-beam deposition technique. We obtained a CsCl-type (B2) chemically ordered phase for annealed nanoalloys. Using different experimental measurements, we show how decreasing the size affects the magnetic properties. FeRh nanoparticles keep the ferromagnetic order at low temperature due to surface relaxation affecting the cell parameter. In the case of FeCo clusters, the environment drastically affects the intrinsic properties of this system by reducing the magnetization in comparison to the bulk.
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Affiliation(s)
- Veronique Dupuis
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
| | - Anthony Robert
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
| | - Arnaud Hillion
- Institut Jean Lamour, UMR7198, Université H. Poincarré-CNRS, F-5406 Vandoeuvre les Nancy, France
| | - Ghassan Khadra
- Interfaces, Confinement, Matériaux et Nanostructures, UMR7374 Université d'Orléans-CNRS, F-45071 Orléans cedex, France
| | - Nils Blanc
- Université Grenoble Alpes, Inst NEEL, F-38000 Grenoble, France
- CNRS, Inst NEEL, F-38000 Grenoble, France
| | - Damien Le Roy
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
| | - Florent Tournus
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
| | - Clement Albin
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
| | - Olivier Boisron
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
| | - Alexandre Tamion
- Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon F-69622 Villeurbanne cedex, France
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