Tuning of magnetic properties in Ni-Mn-Ga Heusler-type glass-coated microwires by annealing

García, Carlos; Zhukova, V.; Shevyrtalov, Sergey; Ipatov, M.; Corte-León, Paula; Zhukov, A.

doi:10.1016/j.jallcom.2020.155481

Cited by 11 publications

(11 citation statements)

References 31 publications

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“…In addition, the existence of flexible, thin, highly transparent and insulating glass coating works on improving mechanical and biocompatibility properties, which opens the door for the biomedical application of the G-CMMWs [46][47][48]. Finally, by the single-step method, with a high quenching rate, it is possible to produce microwires from Heusler alloys with single crystalline phase and well-defined magnetic anisotropy [4,7,[33][34][35][36]49,50]. Therefore, the Co 2 -based Heusler G-CMMWs represent a promising smart metamaterial for multi-functional application for a new generation of spintronic devices.…”

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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“…Due to their reduced dimensions, freedom to customize and manufacture their magnetic, electric, mechanical, and structural characteristics, Heusler alloy-based microwires have promising characteristics [19,25]. The Taylor-Ulitovsky method, known since the 1960s, is one of the quick quenching procedures used to produce Heusler alloys glasscoated microwires.…”

Section: Introductionmentioning

confidence: 99%

“…The Taylor-Ulitovsky method, known since the 1960s, is one of the quick quenching procedures used to produce Heusler alloys glasscoated microwires. Using this technique, glass-coated microwires with metallic nucleus s varying in diameter from 0.5 to 100 µm may be produced [19,26]. The major advantage of this low-cost method is that it enables quick (up to a few hundred meters/min) manufacturing of thin and long (a few kilometers) microwires with an extended geometric range.…”

Section: Introductionmentioning

confidence: 99%

Elucidation of the Strong Effect of the Annealing and the Magnetic Field on the Magnetic Properties of Ni<sub>2</sub>-based Heusler Microwires

Salaheldeen¹,

Wederni²,

Ipatov³

et al. 2022

Preprint

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We studied the effect of annealing and the applied magnetic field from 50 Oe to 20 kOe on the magneto-structural behavior of Ni2FeSi-based Heusler microwires fabricated by using Taylor-Ulitovsky technique. Using the XRD analysis, a strong effect of annealing, manifested as the development of the crystallization process, was observed. The average grain size and crystalline phase content of annealed sample increase from 21.3 nm and 34 % to 32.8 nm and 79%, respectively, as-compared to the as-prepared one. In addition, upon annealing phase transforms into a monoclinic martensitic structure with modulation 10M were observed, which cannot be found in the as-prepared sample. Concerning the magnetic properties, both samples show ferromagnetic behavior below and above the room temperature, where the Curie temperature of Ni2FeSi is higher than room temperature. The induced secondary phases have a noticeable effect on the magnetic behavior of the annealed sample, where a high normalized saturation magnetization (NMs) and low normalized reduced remenance (Mr = M/M5K), compared to the as- prepared have been detected. Additionally, the coercivity of annealed sample shows one flipping point at 155 K where it behavior with temperature is changed. Meanwhile, the as-prepared sample show two flipped point at 205 K and 55 K. A mismatch between field cooling (FC) and field heating (FH) magnetization curves with temperature has been detected for annealed sample at low applied magnetic field. In addition the FC and FH curves shows different slopes with variation the temperature and the magnetic field. By increasing the external magnetic field higher than 200 Oe and up to 20 kOe a gradual changing in the magnetic behavior has been detected, where the mismatch and different slopes disappeared at applying magnetic field about 20 kOe. The difference in magnetic and structure behavior of Ni2FeSi microwires sample is discussed considering the effect of induced internal stresses by the presence of a glass coating and the recrystallization and stresses relaxation upon annealing.

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“…Rapid melt quenching process allows easy, cheap and fast fabrication of amorphous, nanocrystalline or metastable crystalline materials with planar (ribbons) or cylindrical (micro wires) geometries [27,28]. There are several fabrication methods involving rapid melt quenching allowing the preparation of magnetic wires in a wide range of diameters: the thickest wires with diameters, d, ranging between 60 and 320 µm can be fabricated by the "in-rotating water" method known since the 80 s [29,30].…”

Section: Introductionmentioning

confidence: 99%

Anomalous Magnetic Behavior in Half-Metallic Heusler Co2fesi Alloy Glass-Coated Microwires with High Curie Temperature

Salaheldeen¹,

García-Gómez²,

Corte-León³

et al. 2022

SSRN Journal

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Tuning of magnetic properties in Ni-Mn-Ga Heusler-type glass-coated microwires by annealing

Cited by 11 publications

References 31 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

Elucidation of the Strong Effect of the Annealing and the Magnetic Field on the Magnetic Properties of Ni<sub>2</sub>-based Heusler Microwires

Anomalous Magnetic Behavior in Half-Metallic Heusler Co2fesi Alloy Glass-Coated Microwires with High Curie Temperature

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