Magnetic Study of LiFe(P,Si)O4 Probed by SQUID and µSR

Fahmi Astuti; Mochammad Zainuri; Darminto Darminto; Muhammad Redo Ramadhan; Dita Puspita Sari; Isao Watanabe

doi:10.4028/p-0on7iS

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 1014Magnetic Study of LiFe(P,Si)O4 Probed by SQUID and...

Magnetic Study of LiFe(P,Si)O₄ Probed by SQUID and µSR

Abstract:

LiFe(P,Si)O₄ is a material that belong to parent compound of LiFePO₄ widely known as cathode material for lithium-ion battery (LIB). Previous study reports that electrochemical performance of LiFePO₄ can be improved by silicon (Si) substitution to the phosphorus (P) site. The sample was obtained via a solid-state synthesis route with the amount of Si doping to the P site is ∼3%. The electrochemical performance of silicon substituted LiFePO₄ has been widely studied in other report whilst the magnetic properties is still less explored. Here we investigate the magnetic properties of LiFe(P,Si)O₄ using superconducting quantum interference device (SQUID) and muon spin relaxation (µSR). The two measurements display a good agreement result showing two anomalies at the temperature of ∼27 K and ∼52 K that represent the Neel Temperature (Τ_N) of Li₂FeSiO₄ and LiFePO₄, respectively. The presence of Li₂FeSiO₄ that is also a candidate of cathode of LIB has been confirmed by X-ray Diffraction (XRD). Based on the current study, there is no alteration of Τ_N on LiFePO₄phase due to Si doping.

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Periodical:

Key Engineering Materials (Volume 1014)

Pages:

105-110

DOI:

https://doi.org/10.4028/p-0on7iS

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Online since:

June 2025

Authors:

Fahmi Astuti*, Mochammad Zainuri, Darminto Darminto, Muhammad Redo Ramadhan, Dita Puspita Sari, Isao Watanabe

Keywords:

Electrochemical, LiFePO₄, Magnetic, Silicon, SQUID

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