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Tunable Structure and Properties of Co-Evaporated Co–C60 Nanocomposite Films.

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Title: Tunable Structure and Properties of Co-Evaporated Co–C60 Nanocomposite Films.
Authors: Gu, Ziyang1,2 (AUTHOR), Gao, Yiting1,2 (AUTHOR), Li, Zhou1,3 (AUTHOR), Zou, Weihang2,4 (AUTHOR), Li, Keming1,2 (AUTHOR), Xu, Huan2 (AUTHOR), Xiao, Zhu1,3,4 (AUTHOR), Fang, Mei2,4 (AUTHOR) meifang@csu.edu.cn
Source: Nanomaterials (2079-4991). May2025, Vol. 15 Issue 10, p715. 10p.
Subjects: Spin valves, Giant magnetoresistance, Magnetic films, Magnetic properties, Organic semiconductors
Abstract: Magnetic nanoparticles (NPs) hold great promise for both fundamental research and future applications due to their unique structural features, high specific surface area, and tailored physical properties. Here, we present a convenient thermal co-evaporation approach to deposit Co–C60 composite films with controlled composition, structure, morphology, and tunable performances, specifically designed for spintronic device applications. By tuning the growth rates of Co and C60 during co-evaporation, the composition of the films can be tuned with different ratios. With a Co/C60 ratio of 5:1, ~300 nm clusters are formed in the films with increased coercivity compared with pure Co films, which is attributed to the interfaces in the composite film. The magnetoresistance (MR), however, becomes dominated by organic semiconductor C60 with ordinary magnetoresistance (OMAR). By increasing the composition of C60 to the ratio of 5:2, the particle diameter decreases while the height increases dramatically, forming magnetic electrodes and, thus, nano-organic spin valves (OSV) in the composite films with giant magnetoresistance (GMR). The work demonstrates a versatile approach to tailoring the structural and functional properties of magnetic NP-composite films for advanced spintronic applications. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Tunable Structure and Properties of Co-Evaporated Co–C60 Nanocomposite Films.
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  Data: <searchLink fieldCode="AR" term="%22Gu%2C+Ziyang%22">Gu, Ziyang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Yiting%22">Gao, Yiting</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Zhou%22">Li, Zhou</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zou%2C+Weihang%22">Zou, Weihang</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Keming%22">Li, Keming</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Huan%22">Xu, Huan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xiao%2C+Zhu%22">Xiao, Zhu</searchLink><relatesTo>1,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fang%2C+Mei%22">Fang, Mei</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<i> meifang@csu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. May2025, Vol. 15 Issue 10, p715. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Spin+valves%22">Spin valves</searchLink><br /><searchLink fieldCode="DE" term="%22Giant+magnetoresistance%22">Giant magnetoresistance</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+films%22">Magnetic films</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+properties%22">Magnetic properties</searchLink><br /><searchLink fieldCode="DE" term="%22Organic+semiconductors%22">Organic semiconductors</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Magnetic nanoparticles (NPs) hold great promise for both fundamental research and future applications due to their unique structural features, high specific surface area, and tailored physical properties. Here, we present a convenient thermal co-evaporation approach to deposit Co–C60 composite films with controlled composition, structure, morphology, and tunable performances, specifically designed for spintronic device applications. By tuning the growth rates of Co and C60 during co-evaporation, the composition of the films can be tuned with different ratios. With a Co/C60 ratio of 5:1, ~300 nm clusters are formed in the films with increased coercivity compared with pure Co films, which is attributed to the interfaces in the composite film. The magnetoresistance (MR), however, becomes dominated by organic semiconductor C60 with ordinary magnetoresistance (OMAR). By increasing the composition of C60 to the ratio of 5:2, the particle diameter decreases while the height increases dramatically, forming magnetic electrodes and, thus, nano-organic spin valves (OSV) in the composite films with giant magnetoresistance (GMR). The work demonstrates a versatile approach to tailoring the structural and functional properties of magnetic NP-composite films for advanced spintronic applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano15100715
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      – Code: eng
        Text: English
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      – SubjectFull: Spin valves
        Type: general
      – SubjectFull: Giant magnetoresistance
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      – SubjectFull: Magnetic films
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      – SubjectFull: Magnetic properties
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      – SubjectFull: Organic semiconductors
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      – TitleFull: Tunable Structure and Properties of Co-Evaporated Co–C60 Nanocomposite Films.
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            NameFull: Gu, Ziyang
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            NameFull: Gao, Yiting
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            NameFull: Li, Zhou
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            NameFull: Li, Keming
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              M: 05
              Text: May2025
              Type: published
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