A sample holder design and calibration technique for the quantum design magnetic properties measurement system superconducting quantum interference device magnetometer

Journal Article · Tue Oct 01 04:00:00 EDT 1996 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147172· OSTI ID:385891

Lewis, L H ^[1]; Bussmann, K M ^[2]

---

1. Center for Materials Science and Engineering, The University of Texas at Austin, Austin, Texas 78712 (United States)
2. Department of Physics, The University of Texas at Austin, Austin, Texas 78712 (United States)

Magnetic measurements performed on low-susceptibility materials often generate concern for the contribution of the sample holder{close_quote}s moment to the resultant measurement value. In this article, we present a unique design of a sample holder and accompanying calibration technique used to obtain accurate magnetic-moment values from compact, low-susceptibility samples measured with the quantum design magnetic properties measurement system superconducting quantum interference device (SQUID) magnetometer. The sample holder design is simple, highly symmetric, easily fabricated, useful over the full temperature range of the magnetometer and is amenable to a correction algorithm that allows the experimentalist to determine accurately the contribution of the sample holder to the measured value. The sample holder is modeled as a semi-infinite linear density of dipoles, and the response of the internal SQUID coil sections to these dipoles is summed to represent the system response to the sample holder. When the correction algorithm was applied to a measurement of NIST SRM 763 aluminum mounted in the sample holder, the error in the magnetic susceptibility decreases substantially from 41.9{percent} down to 1.1{percent}. {copyright} {ital 1996 American Institute of Physics.}

• Research Organization: Brookhaven National Laboratory
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 385891
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 67; ISSN RSINAK; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
66 PHYSICS
CALIBRATION
DESIGN
ERRORS
MAGNETIC SUSCEPTIBILITY
MAGNETOMETERS
SAMPLE HOLDERS
SQUID DEVICES