Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7-δ thin films

M. Malmivirta; H. Palonen; S. Inkinen; L. D. Yao; Jussi Tikkanen; H. Huhtinen; R. Jha; V. P S Awana; S. Van Dijken; P. Paturi

doi:10.1088/0953-8984/28/17/175702

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7-δ thin films

M. Malmivirta, H. Palonen, S. Inkinen, L. D. Yao, Jussi Tikkanen, H. Huhtinen, R. Jha, V. P S Awana, S. Van Dijken, P. Paturi

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

9 Citations (Scopus)

Abstract

We measured the resistivity of pulsed-laser-deposited BaCeO₃ (BCO)-doped YBCO thin films containing spherical BCO particles in fields up to 30 T. The average diameter of the particles depends on the dopant concentration being below 4 nm in all the samples. Raised values of the upper critical field, B_c2, were observed in all the samples. Additionally, the parameter γ, describing the electron mass anisotropy, decreased from 6.2 in the undoped sample to 3.1 in the 8 wt.% BCO-doped sample. These results can be explained by the increased number of defects decreasing the mean free path of electrons and thus lowering the coherence length, which in turn increases B_c2.

Original language	English
Article number	175702
Pages (from-to)	1-6
Number of pages	6
Journal	Journal of physics: Condensed matter
Volume	28
Issue number	17
DOIs	https://doi.org/10.1088/0953-8984/28/17/175702
Publication status	Published - 5 Apr 2016
MoE publication type	A1 Journal article-refereed

Keywords

anisotropy
artificial pinning centers
critical fields
pulsed-laser deposition
YBCO

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10.1088/0953-8984/28/17/175702

Cite this

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title = "Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7-δ thin films",

abstract = "We measured the resistivity of pulsed-laser-deposited BaCeO3 (BCO)-doped YBCO thin films containing spherical BCO particles in fields up to 30 T. The average diameter of the particles depends on the dopant concentration being below 4 nm in all the samples. Raised values of the upper critical field, Bc2, were observed in all the samples. Additionally, the parameter γ, describing the electron mass anisotropy, decreased from 6.2 in the undoped sample to 3.1 in the 8 wt.% BCO-doped sample. These results can be explained by the increased number of defects decreasing the mean free path of electrons and thus lowering the coherence length, which in turn increases Bc2.",

keywords = "anisotropy, artificial pinning centers, critical fields, pulsed-laser deposition, YBCO",

author = "M. Malmivirta and H. Palonen and S. Inkinen and Yao, {L. D.} and Jussi Tikkanen and H. Huhtinen and R. Jha and Awana, {V. P S} and {Van Dijken}, S. and P. Paturi",

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doi = "10.1088/0953-8984/28/17/175702",

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T1 - Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7-δ thin films

AU - Malmivirta, M.

AU - Palonen, H.

AU - Inkinen, S.

AU - Yao, L. D.

AU - Tikkanen, Jussi

AU - Huhtinen, H.

AU - Jha, R.

AU - Awana, V. P S

AU - Van Dijken, S.

AU - Paturi, P.

PY - 2016/4/5

Y1 - 2016/4/5

N2 - We measured the resistivity of pulsed-laser-deposited BaCeO3 (BCO)-doped YBCO thin films containing spherical BCO particles in fields up to 30 T. The average diameter of the particles depends on the dopant concentration being below 4 nm in all the samples. Raised values of the upper critical field, Bc2, were observed in all the samples. Additionally, the parameter γ, describing the electron mass anisotropy, decreased from 6.2 in the undoped sample to 3.1 in the 8 wt.% BCO-doped sample. These results can be explained by the increased number of defects decreasing the mean free path of electrons and thus lowering the coherence length, which in turn increases Bc2.

AB - We measured the resistivity of pulsed-laser-deposited BaCeO3 (BCO)-doped YBCO thin films containing spherical BCO particles in fields up to 30 T. The average diameter of the particles depends on the dopant concentration being below 4 nm in all the samples. Raised values of the upper critical field, Bc2, were observed in all the samples. Additionally, the parameter γ, describing the electron mass anisotropy, decreased from 6.2 in the undoped sample to 3.1 in the 8 wt.% BCO-doped sample. These results can be explained by the increased number of defects decreasing the mean free path of electrons and thus lowering the coherence length, which in turn increases Bc2.

KW - anisotropy

KW - artificial pinning centers

KW - critical fields

KW - pulsed-laser deposition

KW - YBCO

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U2 - 10.1088/0953-8984/28/17/175702

DO - 10.1088/0953-8984/28/17/175702

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SN - 0953-8984

VL - 28

SP - 1

EP - 6

JO - Journal of physics: Condensed matter

JF - Journal of physics: Condensed matter

IS - 17

M1 - 175702

ER -

Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7-δ thin films

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Dirty limit scattering behind the decreased anisotropy of doped YBa2Cu3O7-δ thin films

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Dirty limit scattering behind the decreased anisotropy of doped YBa₂Cu₃O_7-δ thin films