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Xie, Li Shan (author), Jin, Guang Xi (author), He, Lixin (author), Bauer, G.E. (author), Barker, Joseph (author), Xia, Ke (author)
Yttrium iron garnet is the ubiquitous magnetic insulator used for studying pure spin currents. The exchange constants reported in the literature vary considerably between different experiments and fitting procedures. Here we calculate them from first principles. The local Coulomb correction (U-J) of density-functional theory is chosen such...
journal article 2017
document
Wang, S.Z. (author), Xia, K. (author), Bauer, G.E.W. (author)
We compute the thermoelectric transport parameterized by the Seebeck coefficient and thermal/electric conductance of random-alloy FeCo/MgO/FeCo(001) magnetic tunnel junctions (MTJs) from first principles using a generalized Landauer-Büttiker formalism. The thermopower is found to be typically smaller than those of Fe/MgO/Fe(001) MTJs. The ...
journal article 2014
document
Ogrodnik, P. (author), Bauer, G.E.W. (author), Xia, K. (author)
We consider the magnetization dynamics induced by thermally induced spin transfer torques in thin Fe|MgO|Fe tunnel junctions. The magnetization dynamics is described by the Landau-Lifshitz-Gilbert equation, including the thermal torques as computed from first principles. We show that the angular skewness of the torques importantly modifies the...
journal article 2013
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Liu, K. (author), Xia, K. (author), Bauer, G.E.W. (author)
We compute the shot noise in ballistic and disordered Fe|MgO|Fe tunnel junctions by a wave-function-matching method. For tunnel barriers with ?5 atomic layers we find a suppression of the Fano factor as a function of the magnetic configuration. In the antiparallel configuration the shot noise is full up to a threshold bias that indicates the...
journal article 2012
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Jia, X. (author), Xia, K. (author), Bauer, G.E.W. (author)
We compute thermal spin transfer (TST) torques in Fe-MgO-Fe tunnel junctions using a first principles wave-function-matching method. At room temperature, the TST in a junction with 3 MgO monolayers amounts to 10-7??J/m2/K, which is estimated to cause magnetization reversal for temperature differences over the barrier of the order of 10 K. The...
journal article 2011
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Jia, X. (author), Li, Y. (author), Xia, K. (author), Bauer, G.E.W. (author)
Spin valves incorporating perpendicularly magnetized materials are promising structures for memory elements and high-frequency generators. We report the angular dependence of the spin-transfer torque in spin valves with perpendicular equilibrium magnetization computed by first-principles circuit theory and compare results with experiments by...
journal article 2011
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Xia, K. (author), Zwierzycki, M. (author), Talanana, M. (author), Kelly, P.J. (author), Bauer, G.E.W. (author)
journal article 2006
document
Bauer, G.E.W. (author), Tserkovnyak, Y. (author), Brataas, A. (author), Ren, J. (author), Xia, K. (author), Zwierzycki, M. (author), Kelly, P.J. (author)
journal article 2005
document
Zwierzycki, M. (author), Xia, K. (author), Kelly, P.J. (author), Bauer, G.E.W. (author), Turek, I. (author)
journal article 2003
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Xia, K. (author), Kelly, P.J. (author), Bauer, G.E.W. (author), Brataas, A. (author), Turek, I. (author)
journal article 2002
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Xia, X. (author), Kelly, P.J. (author), Bauer, G.E.W. (author), Turek, I. (author)
journal article 2002
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Xia, K. (author), Kelly, P.J. (author), Bauer, G.E.W. (author), Turek, I. (author), Kudrnovský, J. (author), Drchal, V. (author)
journal article 2001
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