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Open Access item Ballistic magnetoresistance in a nanocontact between a Ni cluster and a magnetic thin film

Authors:Muñoz, Manuel
Qian, G. G.
Karar, N.
Cheng, Hao
Saveliev, I. G.
García García, Nicolás
Moffat, T. P.
Chen, P. J.
Gan, L.
Egelhoff Jr., W. F.
Issue Date:29-Oct-2001
Publisher:American Institute of Physics
Citation:Applied Physics Letters 79(18): 2946 (2001)
Abstract:We present measurements of ballistic magnetoresistance in nanocontacts grown by electrodeposition of Ni microclusters on magnetic thin films covered by aluminum oxide layers, using a technique proposed by Schad et al. [D. Allen, R. Schad, G. Zangari, I. Zana, D. Yang, M. C. Tondra, and D. Wang, J. Vac. Sci. Technol. A. 18, 1830 (2000); Appl. Phys. Lett. 76, 407 (2000); D. Allen, R. Schad, G. Zangari, I. Zana, D. Yang, M. C. Tondra, D. Wang, and D. Reed, J. Appl. Phys. 89, 6662 (2001)]. The measurements are made on single Ni clusters in contact with a Ni and Co thin film. We measure the magnetoresistance and observe the relaxation of the magnetization and electrical resistance as a function of time. The clusters are electrodeposited under several different experimental conditions. Some are deposited randomly on an unpatterned film and some through various patterned photoresists that control the location at which the cluster is grown. The typical contact size is estimated from the electrical resistance to be 10–30 nm. Ballistic magnetoresistance values up to 14% are obtained in these first experiments.
Description:3 pages, 4 figures.
Publisher version (URL):http://dx.doi.org/10.1063/1.1413734
Appears in Collections:(LFSPyN) Artículos

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