Observation of single-spin transport in an island-shaped CoFeB double magnetic tunnel junction prepared by magnetron sputtering
Observation of single-spin transport in an island-shaped CoFeB double magnetic tunnel junction prepared by magnetron sputtering
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DOI：
10.1080/14786435.2015.1131343
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发表时间：
2016-01
影响因子：
1.6
通讯作者：
T. Siripongsakul;H. Naganuma;A. Kovács;A. Kohn;M. Oogane;Y. Ando
中科院分区：
文献类型：
--
作者：
T. Siripongsakul;H. Naganuma;A. Kovács;A. Kohn;M. Oogane;Y. Ando
Abstract The Co40Fe40B20(CFB)/MgO/CFB/MgO/CFB-based multilayer was prepared by conventional magnetron sputtering and utilised in the fabrication of double magnetic tunnel junctions (DMTJs) for which the middle CFB layers were island-shaped. By analysing the magnetic property of the CFB islands with Langevin’s equation, it was possible to identify their diameters of 7.6, 8.9 and 11.0 nm; accordingly submicron-scaled DMTJs were fabricated to investigate single-spin transport phenomena. The coulomb staircase and the oscillatory tunnel magnetoresistive (TMR) were able to be observed at 6 K, where the TMR ratio was enhanced up to 60%, which is the highest value ever achieved in this structure.
