Year: 2026
Type: article
Abstract: Fe3Ga4 possesses a helical spin spiral with a complex competition between ferromagnetic and antiferromagnetic ground states. This competition generates multiple metamagnetic transitions that are governed by both the applied magnetic field and temperature. At intermediate temperatures between T1 (68 K) and T2 (360 K), the ferromagnetically aligned spins transition to an antiferromagnetic spin spiral. In this study, magnetoresistance (MR) measurements are performed on an aligned single crystal and compared to magnetization properties in order to gain insight into the unique alignment of the spins. The high-field MR is positive at low temperatures, indicating cyclotronic behavior, and negative at high temperatures from electron–magnon scattering. Of particular significance is a large anomalous positive MR at low fields, possibly due to emergent spin fluctuations, thus prompting further exploration of this multifaceted material.
Source: Applied Physics Letters
DOI: 10.1063/5.0304810
Institutions: United States Naval Academy, University of Maryland, College Park, Virginia Commonwealth University, United States Naval Research Laboratory, Naval Research Laboratory Materials Science and Technology Division, Northeastern University, Massachusetts Institute of Technology, Florida State University, National High Magnetic Field Laboratory
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1019936685, G1093049520, G1138554163, MRI: Acquisition of a Physical Properties Measurement System With 9 Tesla Magnetometer (Dynacool) for Research and Teaching at VCU, National High Magnetic Field Laboratory Renewal 2018-2022, G354028113, G3560959519, G410635398, G5265787806, G6010147111, G6098521345, National High Magnetic Field Laboratory Renewal 2023-2027, G742574937, G8152425740, Collaborative Research: Antiferromagnetic Spin-Flop Transitions in Heusler-Piezoelectric Systems Induced via Voltage, Collaborative Research: Antiferromagnetic Spin-Flop Transitions in Heusler-Piezoelectric Systems Induced via Voltage
OpenAlex ID: W7122789295