Cascading proximity effects in rotating magnetizations

Baker, Thomas E.; Richie-Halford, Adam; Icreverzi, Ovidiu E.; Bill, Andreas

doi:10.1209/0295-5075/107/17001

Cited by 10 publications

(45 citation statements)

References 26 publications

(51 reference statements)

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“…While the abrupt rotation of the magnetization in a dDW causes a sizable redistribution of pair correlations as seen in Ref. 26, the cDW provides for gentler effects. Gor'kov function f than in the Ni-XS.…”

Section: A Triplet Componentsmentioning

confidence: 81%

“…This is related to the effective boundary conditions introduced in Ref. 26. In the case of a dDW (see Sec.…”

Section: A Triplet Componentsmentioning

confidence: 86%

“…10,11 Some change in the f components appear far from the SF interface (right column of Fig. 5) that is due to the cascade effect 26 This will be revisited below when discussing the Co-XS.…”

Section: A Triplet Componentsmentioning

confidence: 95%

“…(7) from Ref. 26. Here again we not only plot the total current (solid line) usually presented but also separate the contributions to the current from the singlet and triplet correlations.…”

Section: B Solution For the Homogeneous Magnetizationmentioning

confidence: 96%

“…This is due to the cascade effect, which is a remix of all pair correlations when the magnetization changes direction. 26 Also, despite their scalar (rotationally invariant) nature, singlet correlations are shown to be affected by the magnetic configuration of the hybrid structure and not only by the magnitude of the magnetization in cDWs.…”

Section: -20mentioning

confidence: 99%

See 4 more Smart Citations

Classification of magnetic inhomogeneities and0−πtransitions in superconducting-magnetic hybrid structures

2016

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We present a comparative study of pair correlations and currents through superconductingmagnetic hybrid systems with a particular emphasis on the tunable Bloch domain wall of an exchange spring. This study of the Gor'kov functions contrasts magnetic systems with domain walls that change at discrete points in the magnetic region with those that change continuously throughout. We present results for misaligned homogeneous magnetic multilayers, including spin valves, for discrete domain walls, as well as exchange springs and helical domain walls -such as Holmiumfor the continuous case. Introducing a rotating basis to disentangle the role of singlet and triplet correlations, we demonstrate that substantial amounts of (so-called short range) singlet correlations are generated throughout the magnetic system in a continuous domain wall via the cascade effect. We propose a classification of 0 − π transitions of the Josephson current into three types, according to the predominant pair correlations symmetries involved in the current. Properties of exchange springs for an experimental study of the proposed effects are discussed. The interplay between components of the Gor'kov function that are parallel and perpendicular to the local magnetization lead to a novel prediction about their role in a proximity system with a progressively twisting helix that is experimentally measurable.

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Section: A Triplet Componentsmentioning

confidence: 81%

“…This is related to the effective boundary conditions introduced in Ref. 26. In the case of a dDW (see Sec.…”

Section: A Triplet Componentsmentioning

confidence: 86%

Section: A Triplet Componentsmentioning

confidence: 95%

Section: B Solution For the Homogeneous Magnetizationmentioning

confidence: 96%

Section: -20mentioning

confidence: 99%

See 3 more Smart Citations

Classification of magnetic inhomogeneities and0−πtransitions in superconducting-magnetic hybrid structures

2016

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Effects from magnetic boundary conditions in superconducting-magnetic proximity systems

Baker

Bill

2016

AIP Advances

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A superconductor-magnetic proximity system displays singlet-triplet pair correlations in the magnetization as a function of inhomogeneities of the magnetic profile. We discuss how the magnetic boundary conditions affects differently the curvature and winding number of rotating magnetizations in the three commonly used structures to generate long range triplet components: an exchange spring, a helical structure and a misaligned magnetic multilayer. We conclude that the choice of the system is dictated by the goal one wishes to achieve in designing a spintronic device but note that only the exchange spring presently offers an experimentally realizable magnetic profile that is tunable.

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Long range triplet Josephson current and 0−πtransitions in tunable domain walls

2014

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The order parameter of superconducting pairs penetrating an inhomogeneous magnetic material can acquire a long range triplet component (LRTC) with nonzero spin projection. This state has been predicted and generated in proximity systems and Josephson junctions. We show, using a realistic domain wall of an exchange spring bilayer, how the LRTC emerges and can be tuned with the twisting of the magnetization. We also introduce a new kind of Josephson current reversal, the singlet-LRTC 0-π transition, that can be observed in one and the same system either by tuning the domain wall or by varying temperature.

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Cascading proximity effects in rotating magnetizations

Cited by 10 publications

References 26 publications

Classification of magnetic inhomogeneities and0−πtransitions in superconducting-magnetic hybrid structures

Classification of magnetic inhomogeneities and0−πtransitions in superconducting-magnetic hybrid structures

Effects from magnetic boundary conditions in superconducting-magnetic proximity systems

Long range triplet Josephson current and 0−πtransitions in tunable domain walls

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