In this letter, authors demonstrate magnetoresistance of the order of 18% at room temperature for a focused-ion-beam-fabricated nanoconstriction with critical dimensions of the order of . The main purpose of this work is to show that focused ion beam (FIB)-fabricated nanoconstrictions are relatively reproducible and thus could be further developed to obtain substantially larger magnetoresistance. Magnetoresistance is expected to increase if critical dimensions of nanoconstrictions are further reduced. The proposed focused-ion-beam-fabricated nanoconstrictions could be also used as devices to study the electron “ballistic” regime in the emerging fields of Spintronics and magnetoresistive random access memory (MRAM).
REFERENCES
1.
S.
Khizroev
and D.
Litvinov
, Rev. Nanotechnology
14
, R7
(2004
).2.
D. E.
Heim
, R. E.
Fontana
, Jr., C.
Tsang
, V. S.
Speriosu
, B. A.
Gurney
, and M. L.
Williams
, IEEE Trans. Magn.
30
, 316
(1994
).3.
S.
Khizroev
, J. A.
Bain
, and M. H.
Kryder
, IEEE Trans. Magn.
33
, 2893
(1997
).4.
G. A.
Prinz
and K.
Hathaway
, Phys. Today
48
, 24
(1995
).5.
N.
Garcia
, M.
Munoz
, and Y.-W.
Zhao
, Phys. Rev. Lett.
82
, 2923
(1999
).6.
N.
Garcia
, M.
Munoz
, G. G.
Qian
, H.
Rohrer
, I. G.
Saveliev
, and Y.-W.
Zhao
, Appl. Phys. Lett.
79
, 4550
(2001
).7.
8.
S.
Mukherjee
, D.
Litvinov
, and S.
Khizroev
, IEEE Trans. Magn.
40
, 2143
(2004
).9.
J. L.
Moruzzi
, J. F.
Janak
, and A. R.
Williams
, Calculated Band Structure Properties
(Pergamon
, New York, 1978
).10.
N.
Carcia
, Magnetic Nanoconstrictions, Research Meeting at Seagate Research
, Pittsburgh, PA, 2002
.11.
H. D.
Chopra
and S. Z.
Hua
, Phys. Rev. B
66
, 020403
(R) (2002
).12.
Y. K.
Kim
and T. J.
Silva
, Appl. Phys. Lett.
68
, 2885
(1996
).13.
N. M. P.
Guillaume
, M. W.
Cresswell
, R. A.
Allen
, S.
Everist
, and L. W.
Linholm
, Proceedings of the IEEE International Conference on Microelectronics Test Structures
, Goteborg, Sweden, March 15–18, 62
–6
, 1999
.14.
M. H.
Kryder
, J. A.
Bain
, and M.
Xiao
, Proceedings of ISPMM
, Seoul, Korea, August 1995
.© 2005 American Institute of Physics.
2005
American Institute of Physics
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