Magnetic Properties of Multifunctional ${}^7$LiFePO${}_4$ under Hydrostatic Pressure

Abstract

LiFePO${}_4$ (LFPO) is an archetypical and well-known cathode material for rechargeable Li-ion batteries. However, its quasi-one-dimensional (Q1D) structure along with the Fe ions, LFPO also displays interesting low-temperature magnetic properties. Our team has previously utilized the muon spin rotation (${\mu }^{+}$SR) technique to investigate both magnetic spin order as well as Li-ion diffusion in LFPO. In this initial study we extend our investigation and make use of high-pressure ${\mu }^{+}$SR to investigate effects on the low-$T$ magnetic order. Contrary to theoretical predictions we find that the magnetic ordering temperature as well as the ordered magnetic moment increase at high pressure (compressive strain).

arXiv comment8 pages, 6 figures, submitted as a part of the International Conference on Muon Spin Rotation, Relaxation and Resonance 2022. Accepted Dec 2022

References in corpus (5)

• musrfit: A free platform-independent framework for muSR data analysis
• Suppression of Phase Separation in LiFePO4 Nanoparticles During Battery Discharge
• High pressure research using muons at the Paul Scherrer Institute
• Pressure-induced quantum critical and multicritical points in a frustrated spin liquid
• Exceptional field dependence of antiferromagnetic magnons in LiFePO${}_4$