Influence of Co addition on the magnetic properties and magnetocaloric effect of Nanoperm (Fe1−XCoX)75Nb10B15 type alloys prepared by mechanical alloying

Ipus, J.J.; Blázquez, J.S.; Franco, V.; Conde, A.

doi:10.1016/j.jallcom.2009.12.029

Cited by 29 publications

(11 citation statements)

References 30 publications

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“…However, n(T) for the MA-sample exhibits a very different behavior (although similar to that found for other ball milled samples). 12,13 At low temperatures, n > 1 and shows a strong field dependence even at T C , where n(T C ) ¼ 0.905, well above the value observed for the RQ-sample. There is a main factor which has not usually considered in the calculation of DS M (and thus in the calculation of n) using Eq.…”

Section: Resultsmentioning

confidence: 74%

Magnetocaloric effect of Co62Nb6Zr2B30 amorphous alloys obtained by mechanical alloying or rapid quenching

Moreno

Blázquez

Ipus

et al. 2014

Journal of Applied Physics

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Amorphous samples of nominal composition Co 62 Nb 6 Zr 2 B 30 have been prepared using mechanical alloying (MA) and rapid quenching (RQ) techniques. Differences appear in Curie temperature and the phases developed after crystallization. Refrigerant capacity is enhanced 20% in the MA-sample with respect to that of RQ-sample. Neglecting the demagnetizing factor of powder samples significantly affects the exponent n characterizing the field dependence of the maximum magnetic entropy change. V C 2014 AIP Publishing LLC. [http://dx

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Section: Resultsmentioning

confidence: 74%

Magnetocaloric effect of Co62Nb6Zr2B30 amorphous alloys obtained by mechanical alloying or rapid quenching

Moreno

Blázquez

Ipus

et al. 2014

Journal of Applied Physics

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“…Among RE-based materials Gd 5 Si 2 Ge 2 , [13,14] La(FeSi) 13 , [15][16][17][18] RE 2 Fe 17 intermetallics, [19,20] clathrates Eu 8 Ga 16 Ge 30 , [21] and amorphous alloys [13,14,22] can be found. Among TM-based systems Heusler alloys, [23][24][25] MnAs, [26][27][28][29] cFeNi, [30][31][32] and amorphous alloys [33][34][35][36][37] can be found. A general difference found in BM samples regarding their MCE with respect to that of bulk counterparts is a decrease of the DS M peak but a temperature broadening of the MCE response, which can lead to an enhancement of the refrigerant cooling power.…”

Section: Results On Mce Of Ball-milled Samplesmentioning

confidence: 99%

“…Concerning the field dependence of DS M , the presence of a Curie temperature distribution does not affect the behavior far away from the transition but leads to a smearing of the n(T) curve and, moreover, the values achieved at the (average) Curie temperature are not consistent with the theoretical predictions but higher. [34] In order to obtain a deeper understanding of the effect of the presence of a T C distribution on the MCE response, a non-interacting approach can be assumed and the total DS M can be obtained as a weighted sum using a Gaussian distribution of the individual contributions:…”

Section: Curie Temperature Distributionsmentioning

confidence: 99%

Analysis of the Magnetocaloric Effect in Powder Samples Obtained by Ball Milling

Blázquez

Ipus

Moreno-Ramírez

et al. 2015

Metallurgical and Materials Transactions E

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Since the discovery of the giant magnetocaloric effect (MCE) close to room temperature in FeRh and particularly in Gd 5 Si 2 Ge 2 compounds, the study of this phenomenon has experienced an exponential growth. Among the different techniques used to produce magnetocaloric materials, ball milling has been shown as a very versatile one and presents several advantages over other preparation techniques (e.g., easy scale-up to industrial production). Although a general decrease of the peak value of the magnetic entropy change is observed for milled samples, it can be compensated by the large broadening of the MCE peak, leading to an increase of the refrigeration capacity. In this short review, several aspects inherent to powder samples affecting MCE will be discussed, such as the relevant effect of the demagnetizing field, the possible multiphase character, and the presence of Curie temperature distributions. In mechanically alloyed samples, the two latter factors are typically affected by the degree of integration of the different starting constituents.

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“…x Mn x Zr 10 system is decreased with increasing Mn concentration [10][11][12] Recently, a lot of research groups have concentrated on magnetocaloric materials prepared by using melt-spinning method [13][14][15][16][17][18][19][20][21]. Advantages of those materials are easily changing Curie temperature, possessing GMCE, low coercive force, large electric resistivity, cheaper price etc.…”

Section: Introductionmentioning

confidence: 99%

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

Hà¹

2018

JST

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In this paper, we present the results of studying magnetic properties and magnetocaloric effect of Fe 90-x Pr x Zr 10 (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 (H c < 42 Oe). The magnetic entropy change of the alloys, |∆S m | max > 0.9 J.kg -1 K -1 in magnetic field change H = 12 kOe, shows large magnetocaloric effect at phase transition temperature. On the other hand, the working temperature range is quite large ( FWHM ~ 70 K) revealing an application potential in magnetic refrigeration technology of these alloys.

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Influence of Co addition on the magnetic properties and magnetocaloric effect of Nanoperm (Fe1−XCoX)75Nb10B15 type alloys prepared by mechanical alloying

Cited by 29 publications

References 30 publications

Magnetocaloric effect of Co62Nb6Zr2B30 amorphous alloys obtained by mechanical alloying or rapid quenching

Magnetocaloric effect of Co62Nb6Zr2B30 amorphous alloys obtained by mechanical alloying or rapid quenching

Analysis of the Magnetocaloric Effect in Powder Samples Obtained by Ball Milling

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

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