Switching a spin valve back and forth by current-induced domain wall motion
We have studied the current-induced displacement of a domain wall (DW) in the permalloy (Py) layer of a Co/Cu/Py spin valve structure at zero and very small applied field. The displacement is in oppos...
We have studied the current-induced displacement of a domain wall (DW) in the permalloy (Py) layer of a Co/Cu/Py spin valve structure at zero and very small applied field. The displacement is in oppos...
Simple enhancement of the magnetocaloric effect in giant magnetocaloric materials
A simple method of enhancing the magnetocaloric effect (MCE)) in ferromagnetic materials is described. Thin layers of pure Fe of 0.1- and 0.2-µm thickness were evaporated onto both sides of poli...
A simple method of enhancing the magnetocaloric effect (MCE)) in ferromagnetic materials is described. Thin layers of pure Fe of 0.1- and 0.2-µm thickness were evaporated onto both sides of poli...
Superconducting properties of polycrystalline Nb nanowires templated by carbon nanotubes
Appl. Phys. Lett. 83, 512 (2003); doi:10.1063/1.1592313
Issue Date: 21 July 2003
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Continuous Nb wires, 7–15 nm in diameter, have been fabricated by sputter-coating single fluorinated carbon nanotubes. Transmission electron microscopy revealed that the wires are polycrystalline, having grain sizes of about 5 nm. The critical current of wires thicker than ~12 nm is very high (107 A/cm2) and comparable to the expected depairing current. The resistance versus temperature curves measured down to 0.3 K are well described by the Langer–Ambegaokar–McCumber–Halperin theory of thermally activated phase slips. Quantum phase slips are suppressed. ©2003 American Institute of Physics.
| History: | Received 23 January 2003; accepted 16 March 2003 |
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