Effective decoupling of ferromagnetic sublattices by frustration in Heusler alloys
arXiv:2203.12498 · doi:10.1103/PhysRevB.105.174434
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 multi-sublattices 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.
References in corpus (11)
- Spin Ice State in Frustrated Magnetic Pyrochlore Materials
- Magnetic Monopoles in Spin Ice
- First-principles calculation of the intersublattice exchange interactions and Curie temperatures of full Heusler alloys Ni2MnX (X=Ga, In, Sn, Sb)
- Role of the conduction electrons in mediating exchange interactions in Heusler alloys
- Spirit: Multifunctional Framework for Atomistic Spin Simulations
- Electrical transport in the ferromagnetic state of manganites: Small-polaron metallic conduction at low temperatures
- Evidence of ultra-slow polaron dynamics in low-doped manganites from 139La NMR-NQR and muon spin rotation
- Stripe disorder and dynamics in the hole-doped antiferromagnetic insulator La5/3Sr1/3CoO4
- Magnetic frustration in a metallic fcc lattice
- Neutron diffraction and symmetry analysis of the martensitic transformation in Co-doped NiMnGa
- Exotic magnetic field-induced spin-superstructures in a mixed honeycomb triangular lattice system