Characterization of the Low Temperature Static Magnetic Properties of Cryogel®

ORAL

Abstract

While searching for a “new age” cryogenic insulating material for use in magnetic fields, the silica aerogel known as Cryogel®x201 was identified for its performance at low temperatures [1]. The thermal conductivity of Cryogel® has been reported [2], but the magnetic properties have not been characterized to date. Applications in high magnetic field instrumentation establish a necessity to fingerprint the magnetic properties of Cryogel®. Using a commercial magnetometer, magnetization data, M(2 K ≤ T ≤ 300 K, B = 100 mT) and M(T = 2 K, −1 T ≤ B ≤ 7 T), were collected. These data sets were fit to a Brillouin function with a Curie-like background contribution to extract parameters, namely the spin value and the concentration of magnetic entities. Ultimately, this unexpected magnetic signal is conjectured to be associated with Fe2O3 nanoparticles.

[1] https://www.pacorinc.com/wp-content/uploads/Cryogel-x201-Datasheet.pdf

[2] V. Ilardi et al., IOP Conf. Ser.: Mater. Sci. Eng. 756 (2020) 012005, doi:10.1088/1757-899X/756/1/012005

* This work was supported in part by National Science Foundation (NSF) Research Experiences for Undergraduates (REU) via DMR-1644779 (MagLab), DMR-1852138 (UF Physics), and DMR-1708410 (MWM), and used MagLab facilities supported by DMR-1644779 and the State of Florida. Work by CLB during the Fall 2023 and Spring 2024 semesters is supported by the UF University's Scholar Program.

–

Presenters

  • Caeli L Benyacko

    Dept. of Physics and MagLab, University of Florida

Authors

  • Caeli L Benyacko

    Dept. of Physics and MagLab, University of Florida

  • Alan J Sherman

    Dept. of Physics, University of Florida

  • Raven J Rawson

    Dept. of Physics and MagLab, University of Florida

  • Quinton L Wiebe

    Dept. of Physics, University of Florida

  • Garrett T Hauser

    Dept. of Physics and MagLab, University of Florida; Dept. of Physics, University of Rhode Island

  • Krittin Poottafai

    Dept. of Chemistry, University of Florida

  • Daniel R Talham

    Dept. of Chemistry, University of Florida

  • Mark W Meisel

    Dept. of Physics and MagLab, University of Florida, University of Florida and MagLab, University of Florida