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Title: AC electrical transport detection of magnetic properties of small, granular, and heterogeneous samples

Journal Article · · Review of Scientific Instruments
DOI: https://doi.org/10.1063/5.0250005 · OSTI ID:2551881

Experimental constraints and sample limitations can preclude ideal measurements of electrical transport properties of materials. In such situations, AC electrical transport methods are often employed due to a significant increase in signal-to-noise ratio they can provide. However, dynamic effects that are not often accounted for may be present that may modify the signals in these measurements. In particular, dynamic filtering effects are prominent in small, granular, and heterogeneous materials. We demonstrate that a lock-in amplifier based circuit can distinguish between these DC transport and AC filtering effects. Here, we further demonstrate that this filtering can reveal distinct signatures of magnetic transitions while providing a measure of sample quality.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); University of Illinois, Chicago, IL (United States)
Sponsoring Organization:
Hanoi University of Science and Technology (HUST); National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
Grant/Contract Number:
AC02-06CH11357; NA0003975; NA0004153
OSTI ID:
2551881
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 3 Vol. 96; ISSN 1089-7623; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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