Domain stability effect on magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers

Kim, Dong Ho; Hwang, Tae-Jong

doi:10.1016/j.physc.2007.02.007

Cited by 27 publications

(11 citation statements)

References 17 publications

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“…Variety of superconducting (S) and ferromagnetic (F) materials has been employed to investigate the proximity effect between two antagonistic long-range orderings. For the S layer, Nb [1][2][3][4][5][6][7][8][9] or Pb [10] was mostly used and, for the F layer, Fe [10], Co [8], Ni [3] elements or CuNi [1,2,9] and NiFe alloys [4][5][6][7] have been widely used.…”

Section: Introductionmentioning

confidence: 99%

Suppression of superconductivity in superconductor/ferromagnet multilayers

Hwang¹,

Kim²

2016

Progress in Superconductivity and Cryogenics

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Suppression of the superconducting transition temperature (T c ) of NbN thin films in superconductor/ferromagnet multilayers has been investigated. Both superconducting NbN and ferromagnetic FeN layers were deposited on thermally oxidized Si substrate at room temperature by using reactive magnetron sputtering in an Ar-N 2 gas mixture. The thickness of FeN films was fixed at 20 nm, while the thickness of NbN films was varied from 3 nm to 90 nm. T c suppression was clearly observed in NbN layers up to 70 nm thickness when NbN layer was in proximity with FeN layer. For a given thickness of NbN layer, the magnitude of T c suppression was increased in the order of Si/FeN/NbN, Si/NbN/FeN, and Si/FeN/NbN/FeN structure. This result can be used to design a spin switch whose operation is based on the proximity effect between superconducting and ferromagnetic layers.

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Section: Introductionmentioning

confidence: 99%

Suppression of superconductivity in superconductor/ferromagnet multilayers

Hwang¹,

Kim²

2016

Progress in Superconductivity and Cryogenics

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“…Up to now only critical temperature shifts in the millikelvin range could be obtained in experimental realizations of such a spin valve [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. We believe that the non-optimal choice of the layers thickness and/or the layers materials could be a reason for the small size of the spin-valve effect in the studies cited above.…”

Section: Introductionmentioning

confidence: 99%

Critical temperature oscillations and reentrant superconductivity due to the FFLO like state in F/S/F trilayers

et al. 2011

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“…9 These predictions are consistent with the results of the recent experiments. 21,[27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] Interestingly, the experiments on the Au/Co/Nb/Co/IrMn/Co/Ta/Si show the possibility to have even the triplet switching for the F/S/F system. 42 Theoretically such behavior was found only for the asymmetric clean structures with specific choice of parameters and the amplitude of the corresponding dip on the dependence T c (θ) was pretty small.…”

Section: Introductionmentioning

confidence: 99%

Spin-valve effect in S/F/F and F/S/F structures of atomic thickness

Devizorova¹,

Миронов²

2017

Preprint

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We show that the peculiarities of the electron band structure strongly affect the spin-valve effect in heterostructures consisting of a superconductor (S) and two ferromagnetic layers F1 and F2. For the S/F1/F2 systems the energy shift between the electron bands in the S and F2 layers determines wether the critical temperature Tc of the superconductor increases or decreases as a function of the angle θ between the magnetic moments in the ferromagnets. In the case of half-metallic F2 layer the type of the spin-valve effect becomes dependent on the position of the only occupied spin-band and the minimum of Tc may correspond to the anti-parallel, parallel or non-collinear orientations of magnetic moments. Also, for the first time, we analytically demonstrate the possibility of the triplet spin-valve effect in the F/S/half-metal structures.

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Domain stability effect on magnetoresistance in ferromagnet/superconductor/ferromagnet trilayers

Cited by 27 publications

References 17 publications

Suppression of superconductivity in superconductor/ferromagnet multilayers

Suppression of superconductivity in superconductor/ferromagnet multilayers

Critical temperature oscillations and reentrant superconductivity due to the FFLO like state in F/S/F trilayers

Spin-valve effect in S/F/F and F/S/F structures of atomic thickness

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