M.B. Ritter, D.D. Awschalom, et al.
Physical Review Letters
A flexible combination of superconducting integrated circuits was used to construct a low-temperature magneto-optic microsusceptometer utilizing a dc superconducting quantum inteference device (SQUID) detector operating near the quantum limit (coupled energy sensitivity of 1.7ℏ). Miniature pick-up loop assemblies on transparent substrates were joined by superconducting interchip connections to a thin-film dc SQUID, which is in turn read out by a second dc SQUID connected to room-temperature electronics. Measurements on an 8.5-μm-diam titanium dot evaporated directly into the pick-up loop demonstrate a spin sensitivity of ∼103 spins/(Hz)1/2 at T=290 mK.
M.B. Ritter, D.D. Awschalom, et al.
Physical Review Letters
M.B. Ketchen, J.R. Kirtley
IEEE TAS
K.A. Khachaturyan, D.D. Awschalom, et al.
Physical Review Letters
D.D. Awschalom, M.R. Freeman, et al.
Physical Review Letters