Abstract
Scanning superconducting quantum interference device (SQUID) sensors have high sensitivity to magnetic flux (10−6Φ0/ √ Hz) and magnetic moment (∼ 100 electron spins) under reasonable scanning conditions. In addition, a single turn field coil co-centered with the SQUID sensing loop provides excitation for simultaneous measurement of low field susceptibility, with sensitivity of χ ∼ 10−6 at a spatial resolution of a few microns. I will present our recent measurements on several systems which exhibit weak susceptometry signals: thin film paramagnetic LaNiO3 that are (hopefully) the precursors to engineered superconducting films; individual magnetotactic bacteria, which are used as MRI contrast agents; and twinned high critical temperature cuprate and pnictide superconducting samples that may experience variations in the superfluid density at the twin boundary
| Original language | English |
|---|---|
| State | Published - 2011 |
| Event | March Meeting of the American Physical Society - Dallas, Texas, United States Duration: 21 Mar 2011 → 25 Mar 2011 |
Conference
| Conference | March Meeting of the American Physical Society |
|---|---|
| Country/Territory | United States |
| City | Dallas, Texas |
| Period | 21/03/11 → 25/03/11 |