G. Grinstein, R.H. Koch
Physical Review B - CMMP
A scanning tunneling microscope is used to locally deposit arrays of nanometer-scale magnets directly within the superconducting planar input coil of an integrated dc SQUID microsusceptometer. Low-temperature frequency-dependent magnetic-susceptibility measurements reveal a narrow resonance which grows and becomes independent of decreasing temperature. Studies as a function of magnet volume, spacing, and applied field are compared to recent predictions for magnetic macroscopic quantum tunneling in small particles. © 1990 The American Physical Society.
G. Grinstein, R.H. Koch
Physical Review B - CMMP
G. Grinstein
Journal of Statistical Physics
G. Grinstein, John Toner
Physical Review Letters
M.R. Freeman, D.D. Awschalom, et al.
QELS 1989