Skip to main content Accesibility Help

Tunneling and anisotropic-tunneling magnetoresistance in iron nanoconstrictions fabricated by focused-ion-beam

  • Amalio Fernandez-Pacheco (a1), Jose M De Teresa (a2), Rosa Cordoba (a3) and Ricardo Ibarra (a4)

We report the magnetoresistance (MR) measurements in a nanoconstriction fabricated by focused-ion-beam (FIB) in the tunneling regime of conductance. The resistance of the contact was controlled during the fabrication process, being stable in the metallic regime, near the conductance quantum, and under high vacuum conditions. The metallic contact was deteriorated when exposed to atmosphere, resulting in a conduction mechanism by tunneling. The TMR was found to be of 3% at 24 K. The anisotropic tunneling magnetoresistance (TAMR) was around 2% for low temperatures, with a field angle dependence more abrupt than in bulk Fe. This preliminary result is promising for the application of this technique to fabricate stable ferromagnetic constrictions near the atomic regime of conductance, where high MR values are expected.

Hide All
1Agrait, N. Yeyati, A. L. and Ruitenbeek, J. M. Van, Phys. Rep. 377, 81 (2003).
2García, N., Muñoz, M., and Zhao, Y. W. Phys. Rev. Lett. 82, 2923 (1999).
3Verlslujis, J. J. Bari, M. A. and Coey, J. M. D. Phys. Rev. Lett. 87, 026601 (2001).
4Egelhoff, W. F. Jr. , Gan, L. Ettedgui, H. Kadmon, Y. Powell, C. J. Chen, P. J. Shapiro, A. J. McMichael, R. D. Mallett, J. J. Moffat, T. P. and Stiles, M. D. Svedberg, E. B. J. Appl. Phys 95, 7554 (2004).
5Sokolov, A. Zhang, C. Tsymbal, E. Y. Redepenning, J. and Doudin, B. Nat. Nanotechnology 2, 171 (2007).
6Velev, J. Sabirianov, R. F. Jaswal, S. S. and Tsymbal, E. Y. Phys. Rev. Lett. 94, 127203 (2005).
7Jacob, D. Fernández-Rossier, J., and Palacios, J. J. Phys. Rev. B 77, 165412 (2008).
8Shi, S. –F. and Ralph, D. C. Nat. Nanotech. 2, 522 (2007).
9Doudin, B. and Viret, M. J. Phys.: Cond. Matter. 20, 083201 (2008).
10Céspedes, O., Watts, S. M. and Coey, J. M. D. Appl. Phys. Lett. 87, 083102 (2005).
11Khizroev, S. Hijaki, Y. Chomko, R. Mukheriee, S. Chantrell, R. Wu, X. Carley, R. Litvinov, D. Appl. Phys. Lett. 87, 083102 (2005).
12Krzysteczko, P. and Dumpich, G. Phys. Rev. B 77, 144422 (2008).
13Huang, T. Perzlmaier, K. and Back, C. H. Phys. Rev. B 79, 024414 (2009).
14Fernández-Pacheco, A., Teresa, J. M. De, Córdoba, R., and Ibarra, M. R. Nanotechnology 19, 415302 (2008).
15Obona, J. V. Teresa, J. M. De, Córdoba, R., Fernández-Pacheco, A., and Ibarra, M. R. Microel. Eng. 86, 639 (2009).
16Teresa, J. M. De, Córdoba, R., Fernández-Pacheco, A., Montero, O. Strichovanec, P. and M.Ibarra, R. J. Nanomat. 2009, 936863 (2009).
17Moodera, J. S. and Mathon, G. J. Magn. Mag. Mat 200, 248273 (1999).
18Viret, M. Gauberac, M. Ott, F. Fermon, C. Barreteau, C. Autes, G. and López, R. Guirado, Eur. Phys. J. B 51, 1 (2006).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed