Presentation Title

Magnetic Heat Capacity Characterization of Magnetite

Faculty Mentor

Stephen Tsui

Start Date

23-11-2019 8:45 AM

End Date

23-11-2019 9:30 AM

Location

216

Session

poster 2

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

We investigate the magnetic and thermal properties of magnetite using both vibrating sample magnetometry (VSM) and heat capacity measurement. Magnetite undergoes the Verwey transition, which is a structural phase transition near 120 K. This transition is readily identifiable by VSM. When subjected to an external magnetic field, the Verwey transition is still observable, but the magnetization behavior is altered depending on whether the sample is cooled in the presence of a magnetic field (field cooled) or not (zero field cooled). Heat capacity measurements were performed on a powder sample under these varying magnetic field conditions. The results reveal a magnetic contribution to the heat capacity due to the ordering of the spins. This investigation may contribute to our fundamental understanding of properties that could be of potential benefit for biomedical and magnetic spin device applications.

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Nov 23rd, 8:45 AM Nov 23rd, 9:30 AM

Magnetic Heat Capacity Characterization of Magnetite

216

We investigate the magnetic and thermal properties of magnetite using both vibrating sample magnetometry (VSM) and heat capacity measurement. Magnetite undergoes the Verwey transition, which is a structural phase transition near 120 K. This transition is readily identifiable by VSM. When subjected to an external magnetic field, the Verwey transition is still observable, but the magnetization behavior is altered depending on whether the sample is cooled in the presence of a magnetic field (field cooled) or not (zero field cooled). Heat capacity measurements were performed on a powder sample under these varying magnetic field conditions. The results reveal a magnetic contribution to the heat capacity due to the ordering of the spins. This investigation may contribute to our fundamental understanding of properties that could be of potential benefit for biomedical and magnetic spin device applications.