Influence of Co-Doping on Magnetic Properties and Magnetocaloric Effect of Fe–Co–Zr–Cu–B Melt-Spun Ribbons

2021 ◽  
Vol 21 (4) ◽  
pp. 2552-2557
Author(s):  
Nguyen Hai Yen ◽  
Nguyen Hoang Ha ◽  
Pham Thi Thanh ◽  
Nguyen Huy Ngoc ◽  
Tran Dang Thanh ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Melt Spinning ◽  
Room Temperature ◽  
Tangential Velocity ◽  
Magnetic Behavior ◽  
Entropy Change ◽  
Co Doping ◽  
Melt Spun ◽  
Melt Spun Ribbons

In this work, we investigated magnetic properties and magnetocaloric effect in Fe90−xCoxZr7Cu1B2 (x = 0, 1, 2, 3 and 4) melt-spun ribbons. The ribbons were prepared by using a melt-spinning method with a tangential velocity of a copper wheel of 40 m·s-1. The obtained ribbons are almost amorphous. The alloys exhibit typical soft magnetic behavior with low coercivity at room temperature. A minor replacement of Fe by Co gives an increment in Curie temperature (TC) of the alloys to higher temperatures. The TC of the alloys increases from 242 to 342 K with an increase of x from 0 to 4. Maximum magnetic entropy change, ΔSm max, of the alloys, was found to be larger than 0.7 J·kg-1·K-1 in a magnetic field change ΔH of 12 kOe for all the concentrations of Co. High refrigerant capacitys (RC >100 J ·kg-1 with ΔH = 12 kOe) at room temperature region have been obtained for the alloys. The large magnetocaloric effect near room temperature suggests that the alloys can be considered as magnetic refrigerants in the range of 250–350 K.

scholarly journals MAGNETIC PROPERTIES AND MAGNETOCALORIC EFFECT OF Fe90-xPrxZr10 RAPIDLY QUENCHED ALLOYS

2018 ◽  
Vol 56 (1A) ◽  
pp. 59
Author(s):  
Nguyen Hoang Hà
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Melt Spinning ◽  
Magnetic Behavior ◽  
Entropy Change ◽  
Amorphous Structure ◽  
Rapidly Quenched Alloys ◽  
Application Potential ◽  
Diffraction Patterns ◽  
Roller System

In this paper, we present the results of studying magnetic properties and magnetocaloric effect of Fe90-xPrxZr10 (x = 1, 2 and 3) rapidly quenched alloys. The alloy ribbons with thickness of about 15 µm were prepared by melt-spinning method on a single roller system. X-ray diffraction patterns of the ribbons manifest their almost amorphous structure. Thermomagnetization measurements show that the Curie temperature of the alloys can be controlled to be near room temperature by changing concentration of Pr (x). When the concentration of Pr is increased, saturation magnetization of the alloys increased from 48 emu/g (with x = 1) to 66.8 emu/g (with x = 2). All the ribbons reveal soft magnetic behavior with low coercive force (Hc < 42 Oe). The magnetic entropy change of the alloys, |∆Sm|max > 0.9 J.kg-1K-1 in magnetic field change DH = 12 kOe, shows large magnetocaloric effect at phase transition temperature. On the other hand, the working temperature range is quite large (dFWHM ~ 70 K) revealing an application potential in magnetic refrigeration technology of these alloys.

A Large Inverse Magnetocaloric Effect in Ni49.0Mn37.4Sn13.6 Melt-Spun Ribbons at Room Temperature

2009 ◽  
Vol 1 (3) ◽  
pp. 151-155 ◽  
Author(s):  
Ingale Babita ◽  
Raghavan Gopalan ◽  
Shanker Ram ◽  
Hans-Jörg Fecht
Keyword(s):  
Magnetocaloric Effect ◽  
Room Temperature ◽  
Melt Spun ◽  
Melt Spun Ribbons

scholarly journals Microstructure and Magnetic Properties of Grain Refined Pr2Co14B Melt-Spun Ribbons

2019 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
I. Nlebedim ◽  
M. Huang ◽  
K. Sun ◽  
L. Zhou ◽  
R. McCallum ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Room Temperature ◽  
Anisotropy Field ◽  
Triple Junctions ◽  
Heat Treated ◽  
Melt Spun ◽  
The Matrix ◽  
Melt Spun Ribbons ◽  
Low Solubility ◽  
Microstructure And Magnetic Properties

The correlation between the grain refining effect of TiC on the microstructure of Pr2Co14B melt-spun ribbons and the magnetic properties is presented in this study. TiC enabled greater control of microstructure both in the as-spun and heat treated Pr2Co14B, compared with the material without TiC. As a result, coercivity of the sample with TiC was nearly twice that of the sample without TiC. In addition to Pr2Co14B, two other phases were found in the sample with TiC: one rich in Co and the other having a composition near PrCo2. TiC was found near the grain boundaries and at triple junctions. Also no Ti or C was found in the matrix phase indicating extreme low solubility of the elements when both are present with Pr2Co14B. As expected, both the samples with and without TiC have similar anisotropy field but the presence of room temperature non-ferromagnetic phases (TiC and PrCo2), caused a small decrease in magnetization of the sample with TiC although the romance of the isotropic materials were comparable.

scholarly journals Microstructure and Magnetocaloric Effect by Doping C in La-Fe-Si Ribbons

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 343
Author(s):  
Huihui Song ◽  
Yuhu Hu ◽  
Jiale Zhang ◽  
Jinyu Fang ◽  
Xueling Hou
Keyword(s):  
Magnetic Properties ◽  
Magnetic Entropy Change ◽  
Entropy Change ◽  
Magnetic Entropy ◽  
Microstructure Observation ◽  
A Value ◽  
Melt Spun ◽  
Melt Spun Ribbons ◽  
Quenching Method ◽  
Fast Quenching

The melt-spun ribbons of LaFe11.5Si1.5Cx (x = 0, 0.1, 0.2, 0.3) compounds are prepared by the melt fast-quenching method. The doping of C is beneficial to the nucleation and precipitation of the La (Fe, Si)13 phase, which is indicated by the microstructure observation and the elemental analysis. Subsequently, the ribbons of LaFe11.5Si1.5C0.2 are annealed at different times, and the phase composition, the microstructures, and the magnetic properties are investigated. The LaFe11.5Si1.5C0.2 ribbons annealed at 1273 K for 2 h achieved the best magnetic properties, and the maximum isothermal magnetic entropy change with a value of 9.45 J/(kg·K) upon an applied field of 1.5 T at an increased Curie temperature 255 K.

scholarly journals Tunable magnetocaloric effect in amorphous Gd-Fe-Co-Al-Si alloys

2022 ◽  
Author(s):  
Natalia Lindner ◽  
Zbigniew Śniadecki ◽  
Mieszko Kołodziej ◽  
Jean-Marc Grenèche ◽  
Jozef Marcin ◽  
...  
Keyword(s):  
Magnetocaloric Effect ◽  
Mean Field ◽  
Magnetic Behavior ◽  
Entropy Change ◽  
X Ray Diffraction ◽  
Mean Field Model ◽  
Melt Spun ◽  
Parent Alloy ◽  
The Mean ◽  
The Magnetic Field

AbstractA magnetocaloric effect with wide tunability was observed in melt-spun amorphous Gd65Fe15-xCo5+xAl10Si5 (x = 0, 5, 10) alloys of different Fe/Co ratios. Their magnetic properties were compared with those of the previously investigated parent alloy Gd65Fe10Co10Al15. The glassy structure of the melt-spun samples was confirmed by X-ray diffraction (XRD) and 57Fe Mössbauer spectrometry. Their Curie temperatures (TC) were between 155 and 195 K and increased significantly with decreasing Co content. The highest value of the magnetic entropy change ΔSM = − 6.8 J/kg K was obtained for Gd65Fe5Co15Al10Si5, when the magnetic field was increased from 0 to 5 T. Refrigerant capacity (RC) takes values close to 700 J/kg for the whole series of the alloys. The occurrence of the second-order phase transition and the conformity of the magnetic behavior with the mean field model were concluded on the basis of the analysis of the universal curves and the values of the exponent n (ΔSM ∝ Hn). Graphical abstract

scholarly journals Effects of Co doping on the magnetic properties, entropy change, and magnetocaloric effect in Mn3Sn1-xCoxC1.1compounds

2014 ◽  
Vol 63 (16) ◽  
pp. 167502
Author(s):  
Yan Jun ◽  
Sun Ying ◽  
Wang Cong ◽  
Shi Zai-Xing ◽  
Deng Si-Hao ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetocaloric Effect ◽  
Entropy Change ◽  
Co Doping

Comparison of Miogtiwiures and Magnetic Properties of Melt Spun and Plasmla Sprayed Alloys of Fe-Rare Earti-B

1986 ◽  
Vol 80 ◽  
Author(s):  
C. D. Anderson ◽  
R. A. Overfelt ◽  
W. F. Flanagan
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Magnetic Properties ◽  
Melt Spinning ◽  
Room Temperature ◽  
Plasma Deposition ◽  
Solidification Rate ◽  
Heat Treatments ◽  
Melt Spun ◽  
Scanning Electron

AbstractSamples of Fe76RE16B8 have been prepared by melt spinning and plasma deposition. The samples were fully saturated by cooling fran 350°C in a 5 kOe field. The room temperature coercivities of these samples are reported and correlated to the microstructures revealed by scanning electron microscopy. Subsequent heat treatments are shown to either increase or decrease the intrinsic coercivities depending upon the solidification rate that each sample experienced.

Melt Spinning Process and Its Effect on the Magnetic Properties and Structure of Sm (Co, Fe, Cu, Zr)z Melt-Spun Ribbons

2015 ◽  
Vol 51 (11) ◽  
pp. 1-4
Author(s):  
Zhiying Liu ◽  
Yikun Fang ◽  
Wei Sun ◽  
Hongsheng Chen ◽  
Minggang Zhu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Melt Spinning ◽  
Melt Spun ◽  
Spinning Process ◽  
Melt Spun Ribbons
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