Magnetic Properties of Nanoparticles

Measurements were performed at 300 K from ± 5,570 kA/m (±70,000 Oe) and at 5 K from ± 5,570 kA/m (±70,000 Oe) using a superconducting quantum interference device with vibrating sample magnetometer (SQUID VSM) (Quantum Design, Inc). The 5 K data were measured after cooling either in zero applied magnetic field or in the presence of an applied magnetic field of 5.6 MA/m (70,000 Oe). Samples were loaded into Kel-F liquid capsules (LakeShore Cryogenics), and sealed with epoxy to preserve water during measurement under vacuum. Data are normalized to either total iron content, determined by ferene-s method previously described^{60 (link)}, or by total solid content.

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Woodard L.E., Dennis C.L., Borchers J.A., Attaluri A., Velarde E., Dawidczyk C., Searson P.C., Pomper M.G, & Ivkov R. (2018). Nanoparticle architecture preserves magnetic properties during coating to enable robust multi-modal functionality. Scientific Reports, 8, 12706.

Publication 2018

SQUID VSM

Capsules Device Epoxy Ferene s Iron Magnetic field Squid Vacuum

Corresponding Organization :

Other organizations : Johns Hopkins University, Material Measurement Laboratory, NIST Center for Neutron Research, Johns Hopkins Medicine

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Variable analysis

independent variables

Applied magnetic field strength (±5,570 kA/m or ±70,000 Oe)
Temperature (300 K or 5 K)

dependent variables

Magnetic properties (not explicitly specified)

control variables

Superconducting quantum interference device with vibrating sample magnetometer (SQUID VSM) (Quantum Design, Inc) used for measurements
Samples loaded into Kel-F liquid capsules (LakeShore Cryogenics) and sealed with epoxy to preserve water during measurement under vacuum
Data normalized to either total iron content or total solid content

positive controls

Measurement of samples at 5 K with an applied magnetic field of 5.6 MA/m (70,000 Oe)

negative controls

Measurement of samples at 5 K in zero applied magnetic field

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