Influence of the small substitution of Z=Ni, Cu, Cr, V for Fe on the magnetic, magnetocaloric, and magnetoelastic properties of LaFe11.4Si1.6

Pathak, Arjun K.; Basnyat, Prakash; Dubenko, Igor; Stadler, Shane; Ali, Naushad

doi:10.1016/j.jmmm.2009.10.043

Cited by 35 publications

(17 citation statements)

References 19 publications

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“…This RC enhancement is a consequence of the increase in the ∆S M (T). However, the ∆S M (T) and RC values of La 0.55 Ce 0.15 Sr 0.30 MnO 3 sample is smaller in magnitude compared to giant magnetocaloric compounds such as La(Fe,Si) 13 , [21] Gd 5 (Ge,Si) 4 . [1] Moreover, all these compounds undergo first-order magnetic phase transition as a function of temperature and magnetic field in contrast to the second-order phase transition shown by the La 0.55 Ce 0.15 Sr 0.30 MnO 3 sample.…”

Section: Methodsmentioning

confidence: 88%

Enhanced refrigeration capacity and magnetic entropy change in La0.55Ce0.15Sr0.3MnO3 manganite

Anwar

Koo

2015

Electron. Mater. Lett.

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Section: Methodsmentioning

confidence: 88%

Enhanced refrigeration capacity and magnetic entropy change in La0.55Ce0.15Sr0.3MnO3 manganite

Anwar

Koo

2015

Electron. Mater. Lett.

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“…2. Based on the EDS analysis, the composition of La-rich phase is determined to close to La 5 (Fe, Ni, Si) 3 Table I. It is worth noting from Table I that Ni mainly exists in LaFeSi phase and La-rich phase, while Cr element mainly exists in α-Fe phase and no Cr element was found in LaFeSi phase and La 5 Si 3 phase.…”

Section: Methodsmentioning

confidence: 99%

“…1 So far, the effect of element substitution for Fe on the magnetic properties of La(Fe,Si) 13 alloys has been investigated extensively. [2][3][4][5][6][7] For La(Fe 0.99 Z 0.01 ) 11.4 Si 1.6 (Z = Ni, Cu, Cr, V) alloys, it is found that the Curie temperature (Tc) of the matrix alloy would increase while the magnetic entropy change value would decrease by doping Z elements. 3 In addition, the nature of magnetic transition of the alloy changed from first order to second order by the introduction of Ni element.…”

Section: Introductionmentioning

confidence: 99%

“…[2][3][4][5][6][7] For La(Fe 0.99 Z 0.01 ) 11.4 Si 1.6 (Z = Ni, Cu, Cr, V) alloys, it is found that the Curie temperature (Tc) of the matrix alloy would increase while the magnetic entropy change value would decrease by doping Z elements. 3 In addition, the nature of magnetic transition of the alloy changed from first order to second order by the introduction of Ni element. Wang et al found that the the Curie temperature, latent heat, relative cooling power and magnetic entropy change would all decrease with the partial substitution of Cr (x < 0.2) for Fe in LaFe 11.5−x Cr x Si 1.5 , but the first order magnetic transition remains unchanged.…”

Section: Introductionmentioning

confidence: 99%

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Solid solubility in 1:13 phase of doping element for La(Fe,Si)13 alloys

et al. 2016

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The influences of Ni, Cr and Nb as substitution elements for Fe were investigated. The change in microstructure and the magnetic properties have been discussed in detail. Substitution elements Ni, Cr and Nb not only have limited solubility in NaZn13-type (1:13) phase, but also hinder the peritectoid reaction. Ni element mainly enters into La-rich phase while Cr element mainly concentrates in α-Fe phase, which both have detriment effect on the peritectoid reaction, leading to a large residual of impurity phases after annealing and a decrease of magnetic entropy change. Besides, Ni and Cr participated in peritectoid reaction by entering parent phases but slightly entering 1:13 phase, which would cause the disappearance of first order magnetic phase transition. A new phase (Fe,Si)2Nb was found when Nb element substitutes Fe in La(Fe,Si)13, suggesting that Nb does not participate in peritectoid reaction and only exists in (Fe,Si)2Nb phase after annealing. The alloy with Nb substitution maintains the first order magnetic phase transition character.

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“…Conventional refrigeration technologies based on the gascompression/expansion cooling mechanisms may gradually be replaced by the environmentally friendly and more efficient magnetic refrigeration in the near future [1][2][3][4][5]. Magnetic refrigeration is based on the magnetocaloric effect (MCE) which results from the coupling of a system of magnetic moments with an external magnetic field resulting in the cooling or heating of a system.…”

Section: Introductionmentioning

confidence: 99%

Optimization of magnetocaloric properties of arc-melted and spark plasma-sintered LaFe11.6Si1.4

et al. 2016

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LaFe 11.6 Si 1.4 alloy has been synthesized in polycrystalline form using both arc melting and spark plasma sintering (SPS). The phase formation, hysteresis loss and magnetocaloric properties of the LaFe 11.6 Si 1.4 alloys synthesized using the two different techniques are compared. The annealing time required to obtain the 1:13 phase is significantly reduced from 14 days (using the arc melting technique) to 30 min (using the SPS technique). The magnetic entropy change (DS M ) for the arc-melted LaFe 11.6 Si 1.4 compound, obtained for a field change of 5 -0T (decreasing field), was estimated to be 19.6 J kg -1 K -1 . The effective RCP at 5T of the arc-melted LaFe 11.6 Si 1.4 compound was determined to be 360 J kg -1 which corresponds to about 88 % of that observed in Gd. A significant reduction in the hysteretic losses in the SPS LaFe 11.6 Si 1.4 compound was observed. The DS M , obtained for a field change of 5 -0T (decreasing field), for the SPS LaFe 11.6 Si 1.4 compound decreases to 7.4 J kg -1 K -1 . The T C also shifts from 186 (arc-melted) to 230 K (SPS) and shifts the order of phase transition from first to second order, respectively. The MCE of the SPS LaFe 11.6 Si 1.4 compound spreads over a larger temperature range with the RCP value at 5T reaching 288 J kg -1 corresponding to about 70 % of that observed in Gd. At low fields, the effective RCP values of the arc-melted and spark plasma-sintered LaFe 11.6 Si 1.4 compounds are comparable, thereby clearly demonstrating the potential of SPS LaFe 11.6 Si 1.4 compounds in low-field magnetic refrigeration applications.

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Influence of the small substitution of Z=Ni, Cu, Cr, V for Fe on the magnetic, magnetocaloric, and magnetoelastic properties of LaFe11.4Si1.6

Cited by 35 publications

References 19 publications

Enhanced refrigeration capacity and magnetic entropy change in La0.55Ce0.15Sr0.3MnO3 manganite

Enhanced refrigeration capacity and magnetic entropy change in La0.55Ce0.15Sr0.3MnO3 manganite

Solid solubility in 1:13 phase of doping element for La(Fe,Si)13 alloys

Optimization of magnetocaloric properties of arc-melted and spark plasma-sintered LaFe11.6Si1.4

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