Spin and Charge Transport in a Magnetic Tunnel Junction with Magnetic Impurities Embedded in the Tunnel Barrier

M. Misiornya,b,c and J. Barnaśc,d aDepartment of Microtechnology and Nanoscience (MC2), Chalmers Univeristy of Technology, S-41296 Göteborg, Sweden bPeter Grünberg Institut PGI-2, Forschungszentrum Jülich, D-52425 Jülich, Germany cFaculty of Physics, Adam Mickiewicz University, PL-61614 Poznań, Poland dInstitute of Molecular Physics, Polish Academy of Sciences, PL-60179 Poznań, Poland

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Electronic transport in a nanoscopic magnetic tunnel junction with magnetic particles or magnetic impurity atoms/molecules embedded in the barrier is studied theoretically. The impurity Hamiltonian includes magnetic anisotropy of easy axis type with additional perpendicular term. The description takes into account both elastic tunneling processes as well as inelastic processes associated with a flip of electron spin.

DOI: 10.12693/APhysPolA.128.196 PACS numbers: 72.10.Fk, 72.25.-b, 73.23.-b, 75.50.Xx