Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ErNi2B2C

Wulferding, Dirk; Yang, Ilkyu; Yang, Jinho; Lee, Minkyung; Choi, Hee Cheul; Bud'ko, Sergey L.; Canfield, Paul C.; Yeom, Han Woong; Kim, Jeehoon

doi:10.1103/PhysRevB.92.014517

Title: Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ${ErNi}_{2} B_{2} C$

Journal Article · Fri Jul 31 04:00:00 UTC 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI: https://doi.org/10.1103/PhysRevB.92.014517 · OSTI ID:1221930

Wulferding, Dirk ^[1]; Yang, Ilkyu ^[1]; Yang, Jinho ^[1]; Lee, Minkyung ^[1]; Choi, Hee Cheul ^[1]; Bud'ko, Sergey L. ^[2]; Canfield, Paul C. ^[2]; Yeom, Han Woong ^[1]; Kim, Jeehoon ^[1]

Institute for Basic Science, Pohang (Korea); Pohang Univ. of Science and Technology, Pohang (Korea)
Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)

We present a local probe study of the magnetic superconductor ErNi₂B₂C, using magnetic force microscopy at sub-Kelvin temperatures. ErNi₂B₂C is an ideal system to explore the effects of concomitant superconductivity and ferromagnetism. At 500 mK, far below the transition to a weakly ferromagnetic state, we directly observe a structured magnetic background on the micrometer scale. We determine spatially resolved absolute values of the magnetic penetration depth λ and study its temperature dependence as the system undergoes magnetic phase transitions from paramagnetic to antiferromagnetic, and to weak ferromagnetic, all within the superconducting regime. We estimate the absolute pinning force of Abrikosov vortices, which shows a position dependence and temperature dependence as well, and discuss the possibility of the purported spontaneous vortex formation.

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Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1221930

Report Number(s):: IS-J--8771

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 1 Vol. 92; ISSN 1098-0121; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (3)

Pure odd-frequency superconductivity at the cores of proximity vortices Alidoust, Mohammad; Zyuzin, Alexander; Halterman, Klaus Physical Review B, Vol. 95, Issue 4 https://doi.org/10.1103/physrevb.95.045115	journal	January 2017
Visualization of the magnetic flux structure in phosphorus-doped EuFe2As2 single crystals Veshchunov, I. S.; Vinnikov, L. Ya.; Stolyarov, V. S. JETP Letters, Vol. 105, Issue 2 https://doi.org/10.1134/s0021364017020151	journal	January 2017
Pure Odd Frequency Superconductivity at the Cores of Proximity Vortices Alidoust, Mohammad; Zyuzin, Alexander; Halterman, Klaus arXiv https://doi.org/10.48550/arxiv.1611.07525	text	January 2016

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Title: Spatially resolved penetration depth measurements and vortex manipulation in the ferromagnetic superconductor ${ErNi}_{2} B_{2} C$