Observation of macroscopic spin phenomena in nanometer-scale magnets
- 6 August 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 65 (6) , 783-786
- https://doi.org/10.1103/physrevlett.65.783
Abstract
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.Keywords
This publication has 10 references indexed in Scilit:
- Dissipation in macroscopic magnetization tunnelingPhysical Review Letters, 1989
- Low-noise modular microsusceptometer using nearly quantum limited dc SQUIDsApplied Physics Letters, 1988
- Direct deposition of 10-nm metallic features with the scanning tunneling microscopeJournal of Vacuum Science & Technology B, 1988
- Direct writing with the scanning tunneling microscopeJournal of Vacuum Science & Technology A, 1988
- Quantum Mechanics of a Macroscopic Variable: The Phase Difference of a Josephson JunctionScience, 1988
- Quantum Tunneling of Magnetization in Small Ferromagnetic ParticlesPhysical Review Letters, 1988
- Dynamics of the dissipative two-state systemReviews of Modern Physics, 1987
- Perfect and imperfect particlesIEEE Transactions on Magnetics, 1986
- Properties of magnetic fluid particlesIEEE Transactions on Magnetics, 1980
- SuperparamagnetismJournal of Applied Physics, 1959