Oscillatory Nernst effect in Pt|ferrite|cuprate-superconductor trilayer films

Y. Shiomi; J. Lustikova; E. Saitoh

doi:10.1038/s41598-017-05747-6

Oscillatory Nernst effect in Pt|ferrite|cuprate-superconductor trilayer films

Y. Shiomi, J. Lustikova, E. Saitoh

Center for Science and Innovation in Spintronics (CSIS)

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Although magnetism and superconductivity hardly coexist in a single material, recent advances in nanotechnology and spintronics have brought to light their interplay in magnetotransport in thin-film heterostructures. Here, we found a periodic oscillation of Nernst voltage with respect to magnetic fields in Pt|LiFe₅O₈ (Pt|LFO) bilayers grown on a cuprate superconductor YBa₂Cu₃O_7-x (YBCO). At high temperatures above the superconducting transition temperature (T _C) of YBCO, spin Seebeck voltages originating in Pt|LFO layers are observed. As temperature decreases well below T _C, the spin Seebeck voltage is suppressed and unconventional periodic voltage oscillation as a function of magnetic fields appears; such an oscillation emerging along the Hall direction in the superconducting state has not been observed yet. Dynamics of superconducting vortices pinned by surface precipitates seems responsible for the oscillatory Nernst effect.

Original language	English
Article number	5358
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-05747-6
Publication status	Published - 2017 Dec 1

Access to Document

10.1038/s41598-017-05747-6

Cite this

@article{35c98802dec9447d83db5997dd8e15c4,

title = "Oscillatory Nernst effect in Pt|ferrite|cuprate-superconductor trilayer films",

abstract = "Although magnetism and superconductivity hardly coexist in a single material, recent advances in nanotechnology and spintronics have brought to light their interplay in magnetotransport in thin-film heterostructures. Here, we found a periodic oscillation of Nernst voltage with respect to magnetic fields in Pt|LiFe5O8 (Pt|LFO) bilayers grown on a cuprate superconductor YBa2Cu3O7-x (YBCO). At high temperatures above the superconducting transition temperature (T C) of YBCO, spin Seebeck voltages originating in Pt|LFO layers are observed. As temperature decreases well below T C, the spin Seebeck voltage is suppressed and unconventional periodic voltage oscillation as a function of magnetic fields appears; such an oscillation emerging along the Hall direction in the superconducting state has not been observed yet. Dynamics of superconducting vortices pinned by surface precipitates seems responsible for the oscillatory Nernst effect.",

author = "Y. Shiomi and J. Lustikova and E. Saitoh",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s).",

year = "2017",

month = dec,

day = "1",

doi = "10.1038/s41598-017-05747-6",

language = "English",

volume = "7",

journal = "Scientific Reports",

issn = "2045-2322",

publisher = "Nature Publishing Group",

number = "1",

}

TY - JOUR

T1 - Oscillatory Nernst effect in Pt|ferrite|cuprate-superconductor trilayer films

AU - Shiomi, Y.

AU - Lustikova, J.

AU - Saitoh, E.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Although magnetism and superconductivity hardly coexist in a single material, recent advances in nanotechnology and spintronics have brought to light their interplay in magnetotransport in thin-film heterostructures. Here, we found a periodic oscillation of Nernst voltage with respect to magnetic fields in Pt|LiFe5O8 (Pt|LFO) bilayers grown on a cuprate superconductor YBa2Cu3O7-x (YBCO). At high temperatures above the superconducting transition temperature (T C) of YBCO, spin Seebeck voltages originating in Pt|LFO layers are observed. As temperature decreases well below T C, the spin Seebeck voltage is suppressed and unconventional periodic voltage oscillation as a function of magnetic fields appears; such an oscillation emerging along the Hall direction in the superconducting state has not been observed yet. Dynamics of superconducting vortices pinned by surface precipitates seems responsible for the oscillatory Nernst effect.

AB - Although magnetism and superconductivity hardly coexist in a single material, recent advances in nanotechnology and spintronics have brought to light their interplay in magnetotransport in thin-film heterostructures. Here, we found a periodic oscillation of Nernst voltage with respect to magnetic fields in Pt|LiFe5O8 (Pt|LFO) bilayers grown on a cuprate superconductor YBa2Cu3O7-x (YBCO). At high temperatures above the superconducting transition temperature (T C) of YBCO, spin Seebeck voltages originating in Pt|LFO layers are observed. As temperature decreases well below T C, the spin Seebeck voltage is suppressed and unconventional periodic voltage oscillation as a function of magnetic fields appears; such an oscillation emerging along the Hall direction in the superconducting state has not been observed yet. Dynamics of superconducting vortices pinned by surface precipitates seems responsible for the oscillatory Nernst effect.

UR - http://www.scopus.com/inward/record.url?scp=85023774102&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85023774102&partnerID=8YFLogxK

U2 - 10.1038/s41598-017-05747-6

DO - 10.1038/s41598-017-05747-6

M3 - Article

C2 - 28706217

AN - SCOPUS:85023774102

SN - 2045-2322

VL - 7

JO - Scientific Reports

JF - Scientific Reports

IS - 1

M1 - 5358

ER -

Oscillatory Nernst effect in Pt|ferrite|cuprate-superconductor trilayer films

Abstract

Access to Document

Other files and links

Fingerprint

Cite this