Ferromagnetic Resonance Induced Josephson Current in a Superconductor/Ferromagnet/Superconductor Junction

Hikino, S.; Mori, Michiyasu; Takahashi, Saburo; Maekawa, Sadamichi

doi:10.1143/jpsj.77.053707

Cited by 19 publications

(17 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…New interesting effects like the so-called π−state (negative critical Josephson current j c ) or new type of superconducting correlations (odd triplet superconductivity) may arise in JJs of this type [5,6,8]. Although the main attention was paid to the study of the dc Josephson effect, some ac effects in SFS or SmS (m means a magnetic nanoparticle) junctions have been considered, too [9,10,11].…”

mentioning

confidence: 99%

Hybridization of Spin and Plasma Waves in Josephson Tunnel Junctions Containing a Ferromagnetic Layer

Volkov

Efetov

2009

Phys. Rev. Lett.

View full text Add to dashboard Cite

We study dynamics of tunnel Josephson junctions with a thin ferromagnetic layer F [superconductor-insulator-ferromagnet-superconductor (SIFS) junctions]. On the basis of derived equations relating the superconducting phase and magnetic moment to each other we analyze collective excitations in the system and find a new mode which is a hybrid of plasmalike and spin waves. The latter are coupled together in a broad range of parameters characterizing the system. Using the solution describing the collective modes we demonstrate that besides the Fiske steps new peaks appear on the I-V characteristics due to oscillations of the magnetic moment M in the ferromagnetic layer. Thus, by measuring the I-V curve of the SIFS junctions, one can extract information about the spectrum of spin excitations in the ferromagnet F.

show abstract

mentioning

confidence: 99%

Hybridization of Spin and Plasma Waves in Josephson Tunnel Junctions Containing a Ferromagnetic Layer

Volkov

Efetov

2009

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…Recently, the current-voltage characteristic was studied by using the superconducting phase difference coupled with the spin wave excitation in the ferromagnetic Josephson junction within the phenomenological model. 37) And the dc Josephson current coupled with the spin wave excitation was also discussed. 38) Therefore, it might be important to consider the spin wave excitation for the ac Josephson current from microscopic view point.…”

Section: Discussionmentioning

confidence: 99%

Sign Reversal of AC Josephson Current in a Ferromagnetic Josephson Junction

et al. 2009

Self Cite

View full text Add to dashboard Cite

The ac Josephson effect in a ferromagnetic Josephson junction, which is composed of two superconductors separated by a ferromagnetic metal (FM), is studied by a tunneling Hamiltonian and Green's function method. We obtain two types of superconducting phase dependent currents, i.e., Josephson current and quasiparticle-pair-interference current (QPIC). These currents change their signs with thickness of the FM layer due to the 0-transition characteristic to the ferromagnetic Josephson junction. As a function of applied voltage, the Josephson critical current shows a logarithmic divergence called the Riedel peak at the gap voltage, while the QPIC shows a discontinuous jump. The Riedel peak reverses due to the 0-transition and disappears near the 0-transition point. The discontinuous jump in the QPIC also represents similar behaviors to the Riedel peak. These results are in contrast to the conventional ones.

show abstract

“…[37][38][39][40][41][42][43][44] Especially, two review papers by Golubov et al [39] and Buzdin [40] include many valuable information. Recently, the phase dynamics induced by spin waves in a SFS Josephson junction consisting of s-wave superconductors have been numerically studied within the framework of the resistively shunted junction (RSJ) model.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the phase dynamics induced by spin waves in a SFS Josephson junction consisting of s-wave superconductors have been numerically studied within the framework of the resistively shunted junction (RSJ) model. [44] The calculations by Hikino et al [44] have told us that the magnetization of F-layer plays an essential role to understand the nature of phase dynamics.…”

Section: Introductionmentioning

confidence: 99%

Shapiro Steps in BSCCO Intrinsic Josephson Junctions

Kitamura¹

2012

Superconductors - Properties, Technology, and Applications

View full text Add to dashboard Cite

8www.intechopen.com 2 Will-be-set-by-IN-TECH BSCCO consists of a stack of SIS-type IJJs, so it is expected that the BSCCO should be regarded as a good sample to study the fluxon dynamics in the SIS Josephson junctions. Actually, there are many excellent works for the effect of magnetic field on the BSCCO IJJs. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] It is sure that a pioneering work done by Sakai, Bodin and Pedersen(SBP) [20] is the starting point to understand the fluxon dynamics in BSCCO IJJs with a stacking structure.We adopt here a unified theory proposed by Machida and Sakai (MS) [29], which includes both the electric and magnetic field couplings between neighboring IJJs in multistacked structure. The MS-unified theory is a further extension of the model proposed by Sakai, Bodin and Pedersen (SBP).[20] Present paper is mainly based on my previous jobs. [35,36] TheoryLet us consider a stacked system consisting of N-identical SIS-Josephson junctions such as IJJs in BSCCO high-T c superconductors, and set spacial coodinates x, y and z parallel to a, b and c axes of a BSCCO single crystal. If the external magnetic induction B ext is selected parallel to y-axis, i.e., B ext =(0, B ext ,0), and the spacial variation of the gauge-invariant phase difference ϕ ℓ for the ℓ-th SIS Josephson junction is assumed as a function of only x, then the ϕ ℓ (x, t) as a function of x and real time t satisfies a following coupled sine-Gordon(CSG) equation with a matrix form.[29]where λ J is the Josephson penetration depth given by Φ 0 /2πµ 0 d ′ L J c using a flux quantum Φ 0 , the vacuum permeability µ 0 and the critical current density J c . The Σ c and Σ L are matrices describing the electric and magnetic interactions between neighboring Josephson junctions and are written aswhere the coupling constants Σ c and Σ L are given by [29]The d ′ c and d ′ L are the effective electric and magnetic thickness given byusing electrode thickness w and barrier thickness d. The λ e and λ L are the Debye screening length and the London penetration depth, respectively. The J ℓ (x, t) in Eq.(2) is the current defined by j

show abstract

Ferromagnetic Resonance Induced Josephson Current in a Superconductor/Ferromagnet/Superconductor Junction

Cited by 19 publications

References 26 publications

Hybridization of Spin and Plasma Waves in Josephson Tunnel Junctions Containing a Ferromagnetic Layer

Hybridization of Spin and Plasma Waves in Josephson Tunnel Junctions Containing a Ferromagnetic Layer

Sign Reversal of AC Josephson Current in a Ferromagnetic Josephson Junction

Shapiro Steps in BSCCO Intrinsic Josephson Junctions

Contact Info

Product

Resources

About