Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam

Emma Mykkänen; Arijit Bera; Janne S. Lehtinen; Alberto Ronzani; Katja Kohopää; Teresa Hönigl-decrinis; Rais Shaikhaidarov; Sebastian E. De Graaf; Joonas Govenius; Mika Prunnila

doi:10.3390/nano10050950

Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam

Emma Mykkänen (Corresponding Author), Arijit Bera, Janne S. Lehtinen, Alberto Ronzani, Katja Kohopää, Teresa Hönigl-decrinis, Rais Shaikhaidarov, Sebastian E. De Graaf, Joonas Govenius, Mika Prunnila

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

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Abstract

We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and critical temperature increase as the ion dose is increased. For resistivity, the increase is almost linear, whereas critical temperature changes abruptly at the smallest doses and then remains almost constant at 4 K. We believe that our results originate from amorphization of the polycrystalline molybdenum silicide films.

Original language	English
Article number	950
Journal	Nanomaterials
Volume	10
Issue number	5
DOIs	https://doi.org/10.3390/nano10050950
Publication status	Published - 16 May 2020
MoE publication type	A1 Journal article-refereed

Keywords

superconductivity
focused ion beam

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Mykkänen, E., Bera, A., Lehtinen, J. S., Ronzani, A., Kohopää, K., Hönigl-decrinis, T., Shaikhaidarov, R., De Graaf, S. E., Govenius, J., & Prunnila, M. (2020). Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam. Nanomaterials, 10(5), [950]. https://doi.org/10.3390/nano10050950

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title = "Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam",

abstract = "We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and critical temperature increase as the ion dose is increased. For resistivity, the increase is almost linear, whereas critical temperature changes abruptly at the smallest doses and then remains almost constant at 4 K. We believe that our results originate from amorphization of the polycrystalline molybdenum silicide films.",

keywords = "superconductivity, focused ion beam",

author = "Emma Mykk{\"a}nen and Arijit Bera and Lehtinen, {Janne S.} and Alberto Ronzani and Katja Kohop{\"a}{\"a} and Teresa H{\"o}nigl-decrinis and Rais Shaikhaidarov and {De Graaf}, {Sebastian E.} and Joonas Govenius and Mika Prunnila",

year = "2020",

month = may,

day = "16",

doi = "10.3390/nano10050950",

language = "English",

volume = "10",

journal = "Nanomaterials",

issn = "2079-4991",

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Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam. / Mykkänen, Emma (Corresponding Author); Bera, Arijit ; Lehtinen, Janne S.; Ronzani, Alberto; Kohopää, Katja; Hönigl-decrinis, Teresa; Shaikhaidarov, Rais; De Graaf, Sebastian E.; Govenius, Joonas ; Prunnila, Mika.

In: Nanomaterials, Vol. 10, No. 5, 950, 16.05.2020.

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

TY - JOUR

T1 - Enhancement of Superconductivity by Amorphizing Molybdenum Silicide Films Using a Focused Ion Beam

AU - Mykkänen, Emma

AU - Bera, Arijit

AU - Lehtinen, Janne S.

AU - Ronzani, Alberto

AU - Kohopää, Katja

AU - Hönigl-decrinis, Teresa

AU - Shaikhaidarov, Rais

AU - De Graaf, Sebastian E.

AU - Govenius, Joonas

AU - Prunnila, Mika

PY - 2020/5/16

Y1 - 2020/5/16

N2 - We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and critical temperature increase as the ion dose is increased. For resistivity, the increase is almost linear, whereas critical temperature changes abruptly at the smallest doses and then remains almost constant at 4 K. We believe that our results originate from amorphization of the polycrystalline molybdenum silicide films.

AB - We have used focused ion beam irradiation to progressively cause defects in annealed molybdenum silicide thin films. Without the treatment, the films are superconducting with critical temperature of about 1 K. We observe that both resistivity and critical temperature increase as the ion dose is increased. For resistivity, the increase is almost linear, whereas critical temperature changes abruptly at the smallest doses and then remains almost constant at 4 K. We believe that our results originate from amorphization of the polycrystalline molybdenum silicide films.

KW - superconductivity

KW - focused ion beam

U2 - 10.3390/nano10050950

DO - 10.3390/nano10050950

M3 - Article

VL - 10

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 5

M1 - 950

ER -