Mastering disorder in a first-order transition by ion irradiation

S. Cervera, M. LoBue, E. Fontana, M. Eddrief, V. H. Etgens, E. Lamour, S. Macé, M. Marangolo, E. Plouet, C. Prigent, S. Steydli, D. Vernhet, and M. Trassinelli

Phys. Rev. Materials 8, 024406 – Published 13 February 2024

Abstract

The effect of ion irradiation on MnAs single crystalline thin films is studied. The role of elastic collisions between ions and atoms of the material is singled out as the main process responsible for modifying the properties of the material. Thermal hysteresis suppression, and the loss of sharpness of the magnetostructural phase transition, are studied as a function of different irradiation conditions. While the latter is shown to be associated with ion-induced disorder at the scale of the transition correlation length, the former is related to the coupling between disorder and the large-scale elastic field associated with the phase coexistence pattern.

Received 24 July 2023
Accepted 26 January 2024

DOI:https://doi.org/10.1103/PhysRevMaterials.8.024406

Physics Subject Headings (PhySH)

Disclinations & dislocations First order phase transitions Ion impact & scattering Irradiation effects Magnetic phase transitions Magnetocaloric effect

Thin films

Statistical Physics & ThermodynamicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

S. Cervera¹, M. LoBue², E. Fontana^1,3,*, M. Eddrief¹, V. H. Etgens^1,†, E. Lamour ¹, S. Macé¹, M. Marangolo ¹, E. Plouet¹, C. Prigent¹, S. Steydli¹, D. Vernhet¹, and M. Trassinelli ^1,‡

¹Institut des NanoSciences de Paris, CNRS, Sorbonne Université, F-75005 Paris, France
²SATIE, ENS Paris Saclay, CNRS, Université Paris-Saclay, F-91190 Gif-sur-Yvette, France
³Department of Applied Science and Technology, Politecnico di Torino, I-10129 Torino, Italy

^*Present address: Institut Néel, CNRS, F-38042 Grenoble, France.
^†Present address: Centre de Recherche et de Restauration des Musées de France, F-75001 Paris, France.
^‡martino.trassinelli@insp.jussieu.fr

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Issue

Vol. 8, Iss. 2 — February 2024

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