Magnetic frustration in ferromagnetic metallic systems is unusual due to the long-range and symmetric nature of the exchange interactions. In this work we prove that it is possible to obtain a highly frustrated ferromagnetic phase in a multisublattices cubic structure through a fine-tuning of the magnetic interactions. This peculiar state is achieved in Ni-Mn-(In, Sn) Heusler alloys and results in the effective decoupling of their two intertwined ferromagnetic sublattices. One sublattice is ferromagnetic long-range ordered below the macroscopic Curie temperature (TC) whereas the second one remains disordered until a crossover to a polarized state occurs at T≪TC. This result points out that a fine engineering of the magnetic interactions in metallic systems can lead to interesting novel and emergent phenomena.

Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloysIn: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 105:17(2022), p. 174434. [10.1103/PhysRevB.105.174434]

Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloys

Cugini, F.
;
Chicco, S.;Allodi, G.;Bonfa, P.;Vezzoni, V.;Righi, L.;Fabbrici, S.;Albertini, F.;De Renzi, R.;Solzi, M.
2022

Abstract

Magnetic frustration in ferromagnetic metallic systems is unusual due to the long-range and symmetric nature of the exchange interactions. In this work we prove that it is possible to obtain a highly frustrated ferromagnetic phase in a multisublattices cubic structure through a fine-tuning of the magnetic interactions. This peculiar state is achieved in Ni-Mn-(In, Sn) Heusler alloys and results in the effective decoupling of their two intertwined ferromagnetic sublattices. One sublattice is ferromagnetic long-range ordered below the macroscopic Curie temperature (TC) whereas the second one remains disordered until a crossover to a polarized state occurs at T≪TC. This result points out that a fine engineering of the magnetic interactions in metallic systems can lead to interesting novel and emergent phenomena.
Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloysIn: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 105:17(2022), p. 174434. [10.1103/PhysRevB.105.174434]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2924589
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