Bulletin of the American Physical Society
Four Corners Section 2023 Meeting
Friday–Saturday, October 20–21, 2023; River Woods Conference Center, Logan, Utah
Session K01: Poster Session
4:06 PM,
Friday, October 20, 2023
Riverwoods Conference Center
Room: Grand Reception Hall
Abstract: K01.00023 : Pressure-dependence of the Magnetic Susceptibility of EuCd2P2 in Diamond Anvil Cell
Presenter:
ANUKRITI GHIMIRE
(University of Utah)
Authors:
ANUKRITI GHIMIRE
(University of Utah)
Shanti Deemyad
(University of Utah)
Shaun McKeller
(University of Utah)
Willis Holle
(University of Utah)
Mason S Burden
(University of Utah)
Audrey Glende
(University of Utah)
Pressure is an effective tool to tune the interactions in materials and allow testing the theoretical hypothesis. In the case of EuCd2P2, it is known that the observed peak in the temperature dependence of the electrical resistivity occurs right above its neel temperature where it transitions from a paramagnetic material to an A-type anti–ferromagnetic (AFM) material. Ambient pressure studies suggest that CMR in EuCd2P2 arises from spin fluctuations. By comparing the AC magnetic susceptibility and the electrical resistance of EuCd2P2 at the temperatures where the CMR is most prominent, direct evidence of this theory can be obtained. The application of pressure brings the atomic planes closer and their interactions directly contribute to the magnetic state of EuCd2P2.
In this study, we have investigated the AC magnetic susceptibility of EuCd2P2 as a function of pressure and temperature in a Diamond Anvil Cell (DAC) device. Measuring magnetic susceptibility provides insights to the magnetic behavior and electron correlation properties of a material. DAC allows achieving the highest static pressure conditions and is compatible with operation at low temperatures. However, due to very small sample size in a typical DAC experiment, magnetic susceptibility experiments are extremely challenging.
In this study, we present the method of construction of the experimental setup for such measurements, the difficulties associated with obtaining an acceptable signal-to-background ratio, and techniques of data analysis. Future work will include the findings that will help enhance our current understanding of CMR and the unique properties associated with EuCd2P2.
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