A1 Journal article (refereed)
Ferromagnetic kinetic exchange interaction in magnetic insulators (2020)


Huang, Z., Liu, D., Mansikkamäki, A., Vieru, V., Iwahara, N., & Chibotaru, L. F. (2020). Ferromagnetic kinetic exchange interaction in magnetic insulators. Physical Review Research, 2(3), Article 033430. https://doi.org/10.1103/PhysRevResearch.2.033430


JYU authors or editors


Publication details

All authors or editorsHuang, Zhishuo; Liu, Dan; Mansikkamäki, Akseli; Vieru, Veacheslav; Iwahara, Naoya; Chibotaru, Liviu F.

Journal or seriesPhysical Review Research

eISSN2643-1564

Publication year2020

Publication date16/09/2020

Volume2

Issue number3

Article number033430

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevResearch.2.033430

Publication open accessOpenly available

Publication channel open accessOpen Access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/74503


Abstract

The superexchange theory predicts dominant antiferromagnetic kinetic interaction when the orbitals accommodating magnetic electrons are covalently bonded through diamagnetic bridging atoms or groups. Here we show that explicit consideration of magnetic and (leading) bridging orbitals, together with the electron transfer between the former, reveals a strong ferromagnetic kinetic exchange contribution. First-principles calculations show that it is comparable in strength with antiferromagnetic superexchange in a number of magnetic materials with diamagnetic metal bridges. In particular, it is responsible for a very large ferromagnetic coupling (−10 meV) between the iron ions in a Fe3+-Co3+-Fe3+ complex. Furthermore, we find that the ferromagnetic exchange interaction turns into antiferromagnetic by substituting the diamagnetic bridge with magnetic one. The phenomenology is observed in two series of materials, supporting the significance of the ferromagnetic kinetic exchange mechanism.


Keywordselectronsmagnetic propertiesmagnetic fieldstheories

Free keywordsmagnetic coupling; magnetic insulators; density functional theory; Wannier function methods


Contributing organizations


Ministry reportingYes

Reporting Year2020

JUFO rating1


Last updated on 2024-11-03 at 14:29