Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images

Osamu Kamimura; Hiroto Kasai; Tetsuya Akashi; Tsuyoshi Matsuda; Ken Harada; Jun Masuko; Takaho Yoshida; Nobuyuki Osakabe; Akira Tonomura; Marco Beleggia; Giulio Pozzi; Jun-ichi Shimoyama; Tetsuo Hanaguri; Kohji Kishio; Koichi Kitazawa; Masato Sasase; Satoru Okayasu

doi:10.1143/JPSJ.71.1840

Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images

Osamu Kamimura, Hiroto Kasai, Tetsuya Akashi, Tsuyoshi Matsuda, Ken Harada, Jun Masuko, Takaho Yoshida, Nobuyuki Osakabe, Akira Tonomura, Marco Beleggia, Giulio Pozzi, Jun-ichi Shimoyama, Tetsuo Hanaguri, Kohji Kishio, Koichi Kitazawa, Masato Sasase, Satoru Okayasu

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Two types of Fresnel contrasts of superconducting vortices in a Lorentz micrograph, corresponding to pinned and unpinned vortices, were obtained by a newly developed 1 MV field-emission transmission electron microscope on a Bi2Sr2CaCu2O8+delta (Bi-2212) thin specimen containing tilted linear columnar defects introduced by heavy ion irradiation. The main features of the Fresnel contrasts could be consistently interpreted by assuming that the vortices are pinned along the tilted Columnar defects and by using a layered or an anisotropic model to calculate the phase shift of the electron wave. The confirmed validity of both models strongly indicates that superconducting vortices in high-critical temperature (high-T-c) layered materials have an anisotropic structure.

Original language	English
Journal	Journal of the Physical Society of Japan
Volume	71
Issue number	8
Pages (from-to)	1840-1843
Number of pages	4
ISSN	0031-9015
DOIs	https://doi.org/10.1143/JPSJ.71.1840
Publication status	Published - 2002
Externally published	Yes

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Kamimura, O., Kasai, H., Akashi, T., Matsuda, T., Harada, K., Masuko, J., Yoshida, T., Osakabe, N., Tonomura, A., Beleggia, M., Pozzi, G., Shimoyama, J., Hanaguri, T., Kishio, K., Kitazawa, K., Sasase, M., & Okayasu, S. (2002). Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images. Journal of the Physical Society of Japan, 71(8), 1840-1843. https://doi.org/10.1143/JPSJ.71.1840

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title = "Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images",

abstract = "Two types of Fresnel contrasts of superconducting vortices in a Lorentz micrograph, corresponding to pinned and unpinned vortices, were obtained by a newly developed 1 MV field-emission transmission electron microscope on a Bi2Sr2CaCu2O8+delta (Bi-2212) thin specimen containing tilted linear columnar defects introduced by heavy ion irradiation. The main features of the Fresnel contrasts could be consistently interpreted by assuming that the vortices are pinned along the tilted Columnar defects and by using a layered or an anisotropic model to calculate the phase shift of the electron wave. The confirmed validity of both models strongly indicates that superconducting vortices in high-critical temperature (high-T-c) layered materials have an anisotropic structure.",

author = "Osamu Kamimura and Hiroto Kasai and Tetsuya Akashi and Tsuyoshi Matsuda and Ken Harada and Jun Masuko and Takaho Yoshida and Nobuyuki Osakabe and Akira Tonomura and Marco Beleggia and Giulio Pozzi and Jun-ichi Shimoyama and Tetsuo Hanaguri and Kohji Kishio and Koichi Kitazawa and Masato Sasase and Satoru Okayasu",

year = "2002",

doi = "10.1143/JPSJ.71.1840",

language = "English",

volume = "71",

pages = "1840--1843",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "The Physical Society of Japan",

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Kamimura, O, Kasai, H, Akashi, T, Matsuda, T, Harada, K, Masuko, J, Yoshida, T, Osakabe, N, Tonomura, A, Beleggia, M, Pozzi, G, Shimoyama, J, Hanaguri, T, Kishio, K, Kitazawa, K, Sasase, M & Okayasu, S 2002, 'Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images', Journal of the Physical Society of Japan, vol. 71, no. 8, pp. 1840-1843. https://doi.org/10.1143/JPSJ.71.1840

Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images. / Kamimura, Osamu; Kasai, Hiroto; Akashi, Tetsuya et al.
In: Journal of the Physical Society of Japan, Vol. 71, No. 8, 2002, p. 1840-1843.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images

AU - Kamimura, Osamu

AU - Kasai, Hiroto

AU - Akashi, Tetsuya

AU - Matsuda, Tsuyoshi

AU - Harada, Ken

AU - Masuko, Jun

AU - Yoshida, Takaho

AU - Osakabe, Nobuyuki

AU - Tonomura, Akira

AU - Beleggia, Marco

AU - Pozzi, Giulio

AU - Shimoyama, Jun-ichi

AU - Hanaguri, Tetsuo

AU - Kishio, Kohji

AU - Kitazawa, Koichi

AU - Sasase, Masato

AU - Okayasu, Satoru

PY - 2002

Y1 - 2002

N2 - Two types of Fresnel contrasts of superconducting vortices in a Lorentz micrograph, corresponding to pinned and unpinned vortices, were obtained by a newly developed 1 MV field-emission transmission electron microscope on a Bi2Sr2CaCu2O8+delta (Bi-2212) thin specimen containing tilted linear columnar defects introduced by heavy ion irradiation. The main features of the Fresnel contrasts could be consistently interpreted by assuming that the vortices are pinned along the tilted Columnar defects and by using a layered or an anisotropic model to calculate the phase shift of the electron wave. The confirmed validity of both models strongly indicates that superconducting vortices in high-critical temperature (high-T-c) layered materials have an anisotropic structure.

AB - Two types of Fresnel contrasts of superconducting vortices in a Lorentz micrograph, corresponding to pinned and unpinned vortices, were obtained by a newly developed 1 MV field-emission transmission electron microscope on a Bi2Sr2CaCu2O8+delta (Bi-2212) thin specimen containing tilted linear columnar defects introduced by heavy ion irradiation. The main features of the Fresnel contrasts could be consistently interpreted by assuming that the vortices are pinned along the tilted Columnar defects and by using a layered or an anisotropic model to calculate the phase shift of the electron wave. The confirmed validity of both models strongly indicates that superconducting vortices in high-critical temperature (high-T-c) layered materials have an anisotropic structure.

U2 - 10.1143/JPSJ.71.1840

DO - 10.1143/JPSJ.71.1840

M3 - Journal article

SN - 0031-9015

VL - 71

SP - 1840

EP - 1843

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 8

ER -

Direct evidence of the anisotropic structure of vortices interacting with columnar defects in high-temperature superconductors through the analysis of Lorentz images

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