Nano-structuring of all-d-metal NiCoMnTi-based Heusler compounds

Fengqi Zhang; Niels van Dijk; Ekkes Brück; Yang Ren

doi:10.1063/5.0203383

Nano-structuring of all-d-metal NiCoMnTi-based Heusler compounds

Fengqi Zhang^*
, Niels van Dijk
, Ekkes Brück
, Yang Ren^*

^*Corresponding author for this work

Department of Physics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

2 Citations (Scopus)

21 Downloads (CityUHK Scholars)

Abstract

The emerging all-d-metal Ni(Co)MnTi-based Heusler compounds attract extensive attention because it can potentially be employed for solid-state refrigeration. However, in comparison to the abundant physical functionalities in bulk conditions, the hidden properties related to the NiCoMnTi-based Heusler nanoparticles (NPs) have not yet been investigated experimentally. Here, we present NiCoMnTi Heusler NPs that have been manufactured by spark ablation under Ar gas flow, and the related magnetic and microstructural properties have been studied. Compared with the bulk sample, it is found that the magneto-structurally coupled transition in the bulk sample has collapsed into a magnetic transition for the NPs sample. Superparamagnetic NPs with widely distributed dislocations have directly been observed by high-resolution transmission electron microscopy. For the NPs, the magnetocrystalline anisotropy constant is 3.54 × 10⁴ J/m³, while the saturation magnetization after post-treatment has been estimated to be around 26 Am² kg⁻¹. Our current research reveals that Ni-Co-Mn-Ti-based quaternary NPs could show interesting properties for future nano-application, and the produced NPs will further expand the functionalities of this material family.
© 2024 Author(s). Published under an exclusive license by AIP Publishing.

Original language	English
Article number	182407
Number of pages	6
Journal	Applied Physics Letters
Volume	124
Issue number	18
DOIs	https://doi.org/10.1063/5.0203383
Publication status	Published - 29 Apr 2024

Funding

This work was supported by the open research fund of CSNS (Grant Nos. KFKT2022A05 and KFKT2022B04) and the NWO in the domain of the Applied and Engineering Sciences (AES) program. F. Zhang and Y. Ren acknowledge financial support from the City University of Hong Kong (Project No. 9610533).

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Fengqi Zhang, Niels van Dijk, Ekkes Brück, Yang Ren; Nano-structuring of all-d-metal NiCoMnTi-based Heusler compounds. Appl. Phys. Lett. 29 April 2024; 124 (18): 182407 and may be found at https://doi.org/10.1063/5.0203383.

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title = "Nano-structuring of all-d-metal NiCoMnTi-based Heusler compounds",

abstract = "The emerging all-d-metal Ni(Co)MnTi-based Heusler compounds attract extensive attention because it can potentially be employed for solid-state refrigeration. However, in comparison to the abundant physical functionalities in bulk conditions, the hidden properties related to the NiCoMnTi-based Heusler nanoparticles (NPs) have not yet been investigated experimentally. Here, we present NiCoMnTi Heusler NPs that have been manufactured by spark ablation under Ar gas flow, and the related magnetic and microstructural properties have been studied. Compared with the bulk sample, it is found that the magneto-structurally coupled transition in the bulk sample has collapsed into a magnetic transition for the NPs sample. Superparamagnetic NPs with widely distributed dislocations have directly been observed by high-resolution transmission electron microscopy. For the NPs, the magnetocrystalline anisotropy constant is 3.54 × 104 J/m3, while the saturation magnetization after post-treatment has been estimated to be around 26 Am2 kg−1. Our current research reveals that Ni-Co-Mn-Ti-based quaternary NPs could show interesting properties for future nano-application, and the produced NPs will further expand the functionalities of this material family. {\textcopyright} 2024 Author(s). Published under an exclusive license by AIP Publishing.",

author = "Fengqi Zhang and \{van Dijk\}, Niels and Ekkes Br{\"u}ck and Yang Ren",

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AU - Zhang, Fengqi

AU - van Dijk, Niels

AU - Brück, Ekkes

AU - Ren, Yang

PY - 2024/4/29

Y1 - 2024/4/29

N2 - The emerging all-d-metal Ni(Co)MnTi-based Heusler compounds attract extensive attention because it can potentially be employed for solid-state refrigeration. However, in comparison to the abundant physical functionalities in bulk conditions, the hidden properties related to the NiCoMnTi-based Heusler nanoparticles (NPs) have not yet been investigated experimentally. Here, we present NiCoMnTi Heusler NPs that have been manufactured by spark ablation under Ar gas flow, and the related magnetic and microstructural properties have been studied. Compared with the bulk sample, it is found that the magneto-structurally coupled transition in the bulk sample has collapsed into a magnetic transition for the NPs sample. Superparamagnetic NPs with widely distributed dislocations have directly been observed by high-resolution transmission electron microscopy. For the NPs, the magnetocrystalline anisotropy constant is 3.54 × 104 J/m3, while the saturation magnetization after post-treatment has been estimated to be around 26 Am2 kg−1. Our current research reveals that Ni-Co-Mn-Ti-based quaternary NPs could show interesting properties for future nano-application, and the produced NPs will further expand the functionalities of this material family. © 2024 Author(s). Published under an exclusive license by AIP Publishing.

AB - The emerging all-d-metal Ni(Co)MnTi-based Heusler compounds attract extensive attention because it can potentially be employed for solid-state refrigeration. However, in comparison to the abundant physical functionalities in bulk conditions, the hidden properties related to the NiCoMnTi-based Heusler nanoparticles (NPs) have not yet been investigated experimentally. Here, we present NiCoMnTi Heusler NPs that have been manufactured by spark ablation under Ar gas flow, and the related magnetic and microstructural properties have been studied. Compared with the bulk sample, it is found that the magneto-structurally coupled transition in the bulk sample has collapsed into a magnetic transition for the NPs sample. Superparamagnetic NPs with widely distributed dislocations have directly been observed by high-resolution transmission electron microscopy. For the NPs, the magnetocrystalline anisotropy constant is 3.54 × 104 J/m3, while the saturation magnetization after post-treatment has been estimated to be around 26 Am2 kg−1. Our current research reveals that Ni-Co-Mn-Ti-based quaternary NPs could show interesting properties for future nano-application, and the produced NPs will further expand the functionalities of this material family. © 2024 Author(s). Published under an exclusive license by AIP Publishing.

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Nano-structuring of all-d-metal NiCoMnTi-based Heusler compounds

Abstract

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