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Magnetotransport and magnetic properties of amorphous NdNi5 thin films

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2020

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Cirillo, Carla
Barone, Carlo
Bradshaw, Harry
Urban, Francesca
Mauro, Costantino
Robinson, Jason W. A.
Pagano, Sergio
Attanasio, Carmine

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Scientific Reports. Springer Nature. 2020, 10, 13693. eISSN 2045-2322. Available under: doi: 10.1038/s41598-020-70646-2

Zusammenfassung

NdNi5 is an intermetallic compound with a bulk Curie temperature (TCurie) of 6–13 K. While existing studies have focused on NdNi5 crystals, amorphous thin-films of NdNi5 are potentially important since they would be magnetically soft without magnetocrystalline anisotropy, meaning that small external magnetic fields NdNi5 thin-films with a thickness in the 5–200 nm range, deposited by DC magnetron sputtering onto Si(100). Films are amorphous with a weak temperature-dependent resistivity with values ranging between 150 and 300 μΩ cm. By means of noise spectroscopy, by analyzing the time-dependence of fluctuation-induced voltages, it is found that at low temperatures the resistance fluctuations are due to the Kondo effect. Volume magnetometry indicates TCurie =70 K with a magnetic coercive field of 30 mT at 5 K for a 125-nm-thick film. The results are promising for the development of Ferromagnet(F)/Superconductor(S)/Ferromagnet(F) pseudo spin-valve devices based on amorphous NdNi5 thin films.

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ISO 690CIRILLO, Carla, Carlo BARONE, Harry BRADSHAW, Francesca URBAN, Angelo DI BERNARDO, Costantino MAURO, Jason W. A. ROBINSON, Sergio PAGANO, Carmine ATTANASIO, 2020. Magnetotransport and magnetic properties of amorphous NdNi5 thin films. In: Scientific Reports. Springer Nature. 2020, 10, 13693. eISSN 2045-2322. Available under: doi: 10.1038/s41598-020-70646-2
BibTex
@article{Cirillo2020-08-13Magne-50938,
  year={2020},
  doi={10.1038/s41598-020-70646-2},
  title={Magnetotransport and magnetic properties of amorphous NdNi<sub>5</sub> thin films},
  volume={10},
  journal={Scientific Reports},
  author={Cirillo, Carla and Barone, Carlo and Bradshaw, Harry and Urban, Francesca and Di Bernardo, Angelo and Mauro, Costantino and Robinson, Jason W. A. and Pagano, Sergio and Attanasio, Carmine},
  note={Article Number: 13693}
}
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    <dcterms:abstract xml:lang="eng">NdNi&lt;sub&gt;5&lt;/sub&gt; is an intermetallic compound with a bulk Curie temperature (T&lt;sub&gt;Curie&lt;/sub&gt;) of 6–13 K. While existing studies have focused on NdNi&lt;sub&gt;5&lt;/sub&gt; crystals, amorphous thin-films of NdNi&lt;sub&gt;5&lt;/sub&gt; are potentially important since they would be magnetically soft without magnetocrystalline anisotropy, meaning that small external magnetic fields NdNi&lt;sub&gt;5&lt;/sub&gt; thin-films with a thickness in the 5–200 nm range, deposited by DC magnetron sputtering onto Si(100). Films are amorphous with a weak temperature-dependent resistivity with values ranging between 150 and 300 μΩ cm. By means of noise spectroscopy, by analyzing the time-dependence of fluctuation-induced voltages, it is found that at low temperatures the resistance fluctuations are due to the Kondo effect. Volume magnetometry indicates T&lt;sub&gt;Curie&lt;/sub&gt; =70 K with a magnetic coercive field of 30 mT at 5 K for a 125-nm-thick film. The results are promising for the development of Ferromagnet(F)/Superconductor(S)/Ferromagnet(F) pseudo spin-valve devices based on amorphous NdNi&lt;sub&gt;5&lt;/sub&gt; thin films.</dcterms:abstract>
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