Magnetoresistance of Electrons Channelled by Microscopic Magnetic Field Modulation
DAI Bo1, LIU Xiao-Xia1, LEI Yong1, Alain Nogaret2
1School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 6210102Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, UK
Magnetoresistance of Electrons Channelled by Microscopic Magnetic Field Modulation
DAI Bo1, LIU Xiao-Xia1, LEI Yong1, Alain Nogaret2
1School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 6210102Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, UK
摘要We report the magnetoresistance of two-dimensional electron gas, which is made of GaAs based epitaxial multilayers and laterally subjected to a periodic magnetic field. The modulation field is produced by an array of submicrometre ferromagnets fabricated at the surface of the heterostructure. The magnetoresistance of about 20% is found at low temperature 80K. The measurement is in quantitative agreement with semiclassical simulations, which reveal that the magnetoresistance is due to electrons trapped in snake orbits along lines of zero magnetic field.
Abstract：We report the magnetoresistance of two-dimensional electron gas, which is made of GaAs based epitaxial multilayers and laterally subjected to a periodic magnetic field. The modulation field is produced by an array of submicrometre ferromagnets fabricated at the surface of the heterostructure. The magnetoresistance of about 20% is found at low temperature 80K. The measurement is in quantitative agreement with semiclassical simulations, which reveal that the magnetoresistance is due to electrons trapped in snake orbits along lines of zero magnetic field.
DAI Bo;LIU Xiao-Xia;LEI Yong;Alain Nogaret. Magnetoresistance of Electrons Channelled by Microscopic Magnetic Field Modulation[J]. 中国物理快报, 2009, 26(3): 37202-037202.
DAI Bo, LIU Xiao-Xia, LEI Yong, Alain Nogaret. Magnetoresistance of Electrons Channelled by Microscopic Magnetic Field Modulation. Chin. Phys. Lett., 2009, 26(3): 37202-037202.
[1] www.magnet.fsu.edu/education/tutorials/magnetacademy/gmr/index.html [2] Governale M and Boese D 2000 Appl. Phys. Lett. 77 3215 [3] Parkin P, Kaiser C, Panchula A, Rice P M, Hughes B, SamantM and Yang S H 2004 Nature Mater. 3 862 [4] Beenakker W J 1989 Phys. Rev. Lett. 62 2020 [5] Zhu R and Guo Y 2008 J. Appl. Phys. 103 073717 [6] Cerchez M et al 2007 Phys. Rev. B 75 035341 [7] Hugger S et al 2007 Phys. Rev. B 76 195308 [8] Kubrak V et al 2001 IEEE Trans. Magn. 37 1992 [9] Nogaret A et al 2000 Phys. Rev. Lett. 84 2231 [10] Papp G and Peeters F M 2006 J. Appl. Phys. 100 043707 [11] Nogaret A et al 2003 Phys. Rev. B 67 165317 [12] Kubrak V et al 2000 J. Appl. Phys 87 5986 [13] Johnson M et al 1997 Appl. Phys. Lett. 71 974 [14] Agawa K et al 1994 Appl. Phys. Lett. 65 1171 [15] Ashcroft N W and Mermin N D 1976 Solid StatePhysics (New York: Winston)
2009, Vol. 26 
