Prof. Gerber Alexander

  
Affiliation:School of Physics and Astronomy
Shenkar Physics building
room 413
Tel:  (972)-3-6405405
(972)-3-6407023
 
Fax: (972)-3-6422979
 
Email: gerber@tau.ac.il
 
Personal Website:

 
Postal Address:School of Physics and Astronomy
Tel Aviv University
Tel Aviv 69978

Research Interest

Nano-scale magnetism and Hall effect spintronics.

1.  Nanoscale magnetic systems.

a) Spin-dependent electronic transport in ultra-thin magnetic films and granular ferromagnet normal metal and ferromagnet insulator mixtures.

b) Giant magnetoresistance (GMR) and tunneling magnetoresistance (TMR).

c) Extraordinary Hall effect in ultra-thin films and heterogeneous mixtures.

d) Magnetic properties of single nanoscale magnetic clusters and their arrays.

c) Development of new experimental techniques for nanoscale magnetometry, with a special emphasis on the extraordinary Hall effect technique.

d) Development of new magnetic field sensors and memory devices based on the extraordinary Hall effect.

2. Heterogeneous superconducting systems.

a) Localized superconductivity and insulator superconductor transition in granular superconductors.

b) Superconducting fluctuations above and below the metal-insulator transition.

c) Proximity effect in superconductor normal metal and superconductor ferromagnet mixtures.

 

This magnetic field response of an ultra-thin Ni film with lateral dimensions 100 100 nm serves a prototype of the Hall effect - based magnetic memory bit.

Selected Publications


  • Milner, A. Gerber, M. Karpovsky and A. Gladkikh, Spin - Dependent Electronic Transport in Granular Ferromagnets.Phys. Rev. Lett. 76, 475 - 478 (1996).
  • Gerber, A. Milner, J. Tuaillon-Combes, M. Negrier, O. Boisron, P. Melinon, and A. Perez. Probing Planar Arrays of Magnetic Nano-Particles by the Extraordinary Hall Effect. Jour. Magn. Magn. Matt. 241, 340-344 (2002).
  • Gerber, A. Milner, M. Karpovsky, B. Lemke, H.-U. Habermeier, J. Tuaillon-Combes, M. Negrier, O. Boisron, P. Melinon, and A. Perez Extraordinary Hall Effect in Magnetic Films. Jour. Magn. Magn. Matt. 242, 90-97 (2002).
  • Gerber, A. Milner, M. Karpovski, A. Tsukernik, A. Sulpice, J. Tuaillon-Combes, P. Melinon, and A.Perez. Anomalous Magnetization of Nanoscale Ferromagnet/Normal-Metal Systems: Possible Evidence of the Electronic Spin Polarization. Phys. Rev. B 69, 134422 (2004).