Effect of pressure on the magnetic properties of (Co0.5Fe0.5)5GeTe2
Journal article, 2026
Cobalt-doped Fe _5 GeTe _2 possesses a rich magnetic phase diagram as a function of Co concentration. The nature of magnetic order in (Co _{0.5}Fe _{0.5}) _5GeTe _2 is especially interesting, as it has been shown to exhibit ferromagnetic order, A-type antiferromagnetic (AFM) order, or potentially both at the same time. Here we present magnetoresistance measurements on AFM (Co _{0.5}Fe _{0.5}) _5GeTe _5 at a series of pressures and extract the anisotropy and interlayer exchange fields using the two-sublattice model. We show a 50% increase of the interlayer exchange at 2 GPa, highlighting the sensitivity of magnetic properties to interlayer distance. In addition, we find that the sharp hysteretic transitions observed within the AFM state can be qualitatively described by a linear chain model, which suggests an even-odd effect as a function of layer number instead of a coexisting ferromagnetic phase.
antiferromagnet
hydrostatic pressure
magnetoresistance
van der Waals
anomalous Hall effect
Author
Tamas Prok
University of Groningen
Budapest University of Technology and Economics
MTA BME Correlated Waals Struct Momentum Res Grp
Zoltan Kovacs-Krausz
MTA BME Correlated Waals Struct Momentum Res Grp
Budapest University of Technology and Economics
Harvey Stanfield
University of Manchester
Bing Zhao
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Michael Leonard Morgan
Budapest University of Technology and Economics
Balint Fulop
Budapest University of Technology and Economics
Marcos H. D. Guimaraes
University of Groningen
Ivan J. Vera-Marun
University of Manchester
Saroj Prasad Dash
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Szabolcs Csonka
Institute of Technical Physics and Materials Science
Budapest University of Technology and Economics
Peter Makk
MTA BME Correlated Waals Struct Momentum Res Grp
Budapest University of Technology and Economics
Endre Tovari
Budapest University of Technology and Economics
MTA BME Correlated Waals Struct Momentum Res Grp
2D Materials
2053-1583 (eISSN)
Vol. 13 3 035031IMplementing MEasuRes for Sustainable Estuaries (IMMERSE)
European Commission (EC) (J-No:38-2-9-17), 2018-07-01 -- 2021-12-31.
Subject Categories (SSIF 2025)
Condensed Matter Physics
Other Physics Topics
DOI
10.1088/2053-1583/ae9d90