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Pressure and Temperature effects on the crystal structures of colossal magnetoresistance material EuCd2P2

Semester: Summer 2023

Presentation description

Colossal magnetoresistance (CMR) is a fascinating phenomenon seen in certain strongly correlated electron systems, where the electrical resistance undergoes significant variations in the presence of a magnetic field. While the typical CMR materials consist of manganese-based perovskites, recent research has revealed CMR in other systems as well. One such discovery is the exotic material called EuCd2P2, which exhibits CMR behavior and belongs to the A-type antiferromagnetic (AFM) layered system. Unlike the standard CMR mechanism, the CMR behavior in EuCd2P2 has been attributed to spin fluctuations above AFM transitions.||In this study, we are attempting to verify the mechanism of CMR in EuCd2P2 (ECD) by systematic high pressure studies on its structural, electronic and magnetic properties. Pressure can effectively change the interatomic distances without chemical alteration and allow tuning the interactions responsible for different quantum states. In this poster we will discuss the structural properties observed from high pressure and low temperature measurements. During the experiments, we measured the material's properties under both high pressures and low temperatures. While we did not observe any evidence of a structural phase transition within the temperature and pressure ranges of this study, there were significant variations in peak intensity at certain points. Notably, we observed a distinct signature at 14.9K and 3.23 GPa, which warrants further analysis, especially regarding its relation to the electrical measurements. To understand the varied peak intensity better, additional experimentation will be necessary. Future studies will help verify the nature of the CMR effect in EuCd2P2, which can allow for the discovery of more materials with these properties. Applications of this material include potential technological advances, in addition to continued measurement of quantum ground state as EuCd2P2 is a potential superconductor.

Presenter Name: Zoey Brookbanks

Presentation Type: Poster
Presentation Format: In Person
Presentation #55
College: Science
School / Department: Physics & Astronomy
Research Mentor: Shanti Deemyad
Date | Time: Thursday, Aug 3rd | 9:00 AM