First-principles calculations and experimental studies on Co2FeGe Heusler alloy nanoparticles for spintronics applications

Ahmad, Aquil; Srivastava, S. K.; Das, A. K.

doi:10.1016/j.jallcom.2021.160341

Cited by 28 publications

(13 citation statements)

References 70 publications

(77 reference statements)

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“…Therefore, Co 2 -based Heusler alloys are very sensitive to fabrication techniques. Thus, these kinds of alloys are widely investigated by using different fabrication processes [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature

et al. 2022

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In this work, we were able to produce Co2FeSi Heusler alloy glass-covered microwires with a metallic nucleus diameter of about 4,4 µm and total sample diameter of about 17,6 μm by the Taylor–Ulitovsky Technique. This low cost and single step fabrication process allowed the preparation of up to kilometers long glass-coated microwires starting from a few grams of high purity inexpensive elements (Co, Fe and Si), for a wide range of applications. From the X-ray diffraction, XRD, analysis of the metallic nucleus, it was shown that the structure consists of a mixture of crystalline and amorphous phases. The single and wide crystalline peak was attributed to a L21 crystalline structure (5.640 Å), with a possible B2 disorder. In addition, nanocrystalline structure with an average grain size, Dg = 17.8 nm, and crystalline phase content of about 52% was obtained. The magnetic measurements indicated a well-defined magnetic anisotropy for all ranges of temperature. Moreover, soft magnetic behavior was observed for the temperature measuring range of 5–1000 K. Strong dependence of the magnetic properties on the applied magnetic field and temperature was observed. Zero field cooling and field cooling magnetization curves showed large irreversibility magnetic behavior with a blocking temperature (TB= 205 K). The in-plane magnetization remanence and coercivity showed quite different behavior with temperature, due to the existence of different magnetic phases induced from the internal stress created by the glass-coated layer. Moreover, a high Curie temperature was reported (Tc ≈ 1059 K), which predisposes this material to being a suitable candidate for high temperature spintronic applications.

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Section: Introductionmentioning

confidence: 99%

Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature

et al. 2022

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“…Removal of this silica impurity from the resultant nanoparticles by hydrofluoric acid treatment 18 is a challenge by itself. Though a few successful attempts have been made to prepare HA nanoparticles without any template, 19 control of the size of the nanoparticles is difficult in this process. In the template-assisted methods, it is possible to vary the size of the nanoparticles by varying the amount of the silica 16 but in the template-less methods, the only way to control the particle size is by controlling the heat treatment conditions of the precursors.…”

Section: Introductionmentioning

confidence: 99%

Size-dependent properties of single domain Fe₂CoGa nanoparticles prepared by a facile template-less chemical route

2022

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“…Usually, nanoparticles (NP) are defined as an aggregates of single atoms or molecules, with dimension between 1 and 100 nm. Their importance crosses through many fields, such as fundemental physics [141][142][143], nanotechnology [144][145][146][147], energy, environmental [148][149][150] and health science [151][152][153].…”

Section: Optics At Nanoscalementioning

confidence: 99%

Nanoparticle formation in nanoporous structures and applications

et al. 2020

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Firmato digitalme nte da VANELLA ANDREA C=IT I wish to thank Prof. Emilio Mariotti for his help and support during my work days. I would like to thank also Prof.ssa Carmela Marinelli for her valuable advices.Special thanks go to the researchers of the PhysNano laboratory at the Saint Petersburg National Research University of Information technologies, Mechanics and Optics (ITMO) for the preparation of the alumina samples analyzed in this work.I also want to thank Leonardo Stiaccini for the constant and precious technical help and assistance.Finally, I have to thank Nicole for always being there.vii

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First-principles calculations and experimental studies on Co2FeGe Heusler alloy nanoparticles for spintronics applications

Cited by 28 publications

References 70 publications

Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature

Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature

Size-dependent properties of single domain Fe₂CoGa nanoparticles prepared by a facile template-less chemical route

Nanoparticle formation in nanoporous structures and applications

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First-principles calculations and experimental studies on Co2FeGe Heusler alloy nanoparticles for spintronics applications

Cited by 28 publications

References 70 publications

Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature

Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature

Size-dependent properties of single domain Fe2CoGa nanoparticles prepared by a facile template-less chemical route

Nanoparticle formation in nanoporous structures and applications

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Product

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Size-dependent properties of single domain Fe₂CoGa nanoparticles prepared by a facile template-less chemical route