Effects of Cu substitution on structural and magnetic properties of La0.7Pr0.3Fe11.4Si1.6 compounds

Din, Muhamad Faiz Md; Wang, Jianli; Zeng, Rong; Shamba, P.; Debnath, J C; Dou, Shi Xue

doi:10.1016/j.intermet.2012.12.013

Cited by 26 publications

(20 citation statements)

References 31 publications

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“…As details included in Table 3, the compounds were found to exhibit ferromagnetic behaviour with a saturation magnetization below 24 μ B /f.u. [25]. However, it is shown that the replacement Cu for Fe will reduce the saturation magnetization field in La 0.…”

Section: Magnetic Propertiesmentioning

confidence: 97%

“…Magnetic hysteresis loss (as shown by the territory encased between ascending and descending branches of the magnetization curves) is additionally normal for first-order magnetic transition. The magnetization curves obtained for La 0.7 Pr 0.3 Fe 11.4 Si 1.6 (LTA and HTA) for fields in the range B = 0-5 T around their ferromagnetic ordering temperatures have been studied respectively [25]. This information was obtained for increasing and decreasing fields at 5 K and 2 K intervals at 200 K around T C , consequently giving data about magnetic hysteresis loss effect as discussed using the below Equation [28].…”

Section: Introductionmentioning

confidence: 99%

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Effect on Heat Treatment and Doping of Cubic NaZn13-Type La0.7Pr0.3(Fe,Si)13 for Magnetic Refrigerator Application

Din¹,

Wang²,

Ishak³

2018

Intermetallic Compounds - Formation and Applications

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Soft ferromagnetic cubic NaZn 13-type La 0.7 Pr 0.3 Fe 11.4 Si 1.6 has turned out to be a standout amongst the most fascinating compounds for investigating substantial magnetocaloric effect (MCE) on the grounds that the attractive properties of this compound shows large enough spontaneous magnetization for applications, strongly doping dependent, and as well as delicate soft ferromagnetism. These impacts can be attributed to the itinerant electron metamagnetic (IEM) transition especially around the first-order magnetic transition region. However, this compound is difficult to frame by the basic cementing process because of the inherent deficiency of the peritectic response, Υ-Fe + La → La(Fe,Si) 13 (τ 1a), which frequently brings about a blended microstructure of α-Fe + La(Fe,Si) 13 (τ 1a) + LaFeSi(τ 4). Additionally, dependability of La(Fe x Si 1−x) 13 is no middle-of-the-road stage and common solvency amongst Fe and La in the Fe-La framework as a reality is represented by response dispersion as indicated by magnetic and electronic states' contribution. From this point of view, the structure, attractive properties and MCE of this compound have been talked about in detail as indicated by various temperatures and times of the annealing treatment. In addition, efficiently contemplating on the doping impact from various concentrations of transition metal elements such as Copper (Cu) and Chromium (Cr) on Iron (Fe) in the La 0.7 Pr 0.3 Fe 11.4 Si 1.6 compound is likewise discussed.

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Section: Magnetic Propertiesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Effect on Heat Treatment and Doping of Cubic NaZn13-Type La0.7Pr0.3(Fe,Si)13 for Magnetic Refrigerator Application

Din¹,

Wang²,

Ishak³

2018

Intermetallic Compounds - Formation and Applications

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“…1 A giant MCE is commonly observed in materials with a first order magnetic transition (FOMT), but such transitions are usually accompanied by thermal and magnetic hysteresis effects, thus diminishing the magnetic refrigerator performance. 2 Ternary rare-earth (R) compounds of the type RT 2 X 2 , where T ¼ transition metal and X ¼ Si, Ge, exhibit a large variety of structural and physical properties (e.g., Refs. 3 and 4) and as such continue to attract interest.…”

mentioning

confidence: 99%

“…4(a)) in NdMn 1.7 Cr 0.3 Si 2 at T C $ 42(2) K, compares favourably with other materials such as Gd 5 Si 2 Ge 2 (magnetic hysteresis of $1 T and thermal hysteresis of $2 K at T C $ 276 K) 20 and La 0.7 Pr 0.3 Fe 11.4 Si 0.6 (magnetic hysteresis of $0.08 T and thermal hysteresis of $1.5 K at T C $ 180 K). 2 As shown by the magnetic entropy changes in Fig. 5(a) (derived from the magnetization curves using the standard Maxwell relation: 21 …”

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confidence: 99%

Magnetic phase transitions and entropy change in layered NdMn1.7Cr0.3Si2

Din

Wang

Campbell

et al. 2014

Applied Physics Letters

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A giant magnetocaloric effect has been observed around the Curie temperature, TC ∼ 42 K, in NdMn1.7Cr0.3Si2 with no discernible thermal and magnetic hysteresis losses. Below 400 K, three magnetic phase transitions take place around 380 K, 320 K and 42 K. Detailed high resolution synchrotron and neutron powder diffraction (10–400 K) confirmed the magnetic transitions and phases as follows: TNintra ∼ 380 K denotes the transition from paramagnetism to intralayer antiferromagnetism (AFl), TNinter ∼ 320 K represents the transition from the AFl structure to the canted antiferromagnetic spin structure (AFmc), while TC ∼ 42 K denotes the first order magnetic transition from AFmc to canted ferromagnetism (Fmc + F(Nd)) due to ordering of the Mn and Nd sub-lattices. The maximum values of the magnetic entropy change and the adiabatic temperature change, around TC for a field change of 5 T are evaluated to be −ΔSMmax ∼ 15.9 J kg−1 K−1 and ΔTadmax ∼ 5 K, respectively. The first order magnetic transition associated with the low levels of hysteresis losses (thermal <∼0.8 K; magnetic field <∼0.1 T) in NdMn1.7Cr0.3Si2 offers potential as a candidate for magnetic refrigerator applications in the temperature region below 45 K.

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“…Recently, magnetic materials with large MCE have been extensively studied experimentally and theoretically in order to produce suitable materials for actual applications [4][5][6]. First order magnetic phase transition materials appear to be promising candidates.…”

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confidence: 99%

Magnetic Properties and Magnetocaloric Effect in Layered NdMn1.9Ti0.1Si2

et al. 2014

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The structural and magnetic properties of the NdMn 1.9 Ti 0.1 Si 2 compund have been studied by high-intensity x-ray and high-resolution neutron powder diffraction, specific heat, dc magnetization, and differential scanning calorimetry measurements over the temperature range of 3-450 K. The Curie temperature and Néel temperature of layered NdMn 1.9 Ti 0.1 Si 2 are indicated as T C ~ 22 K and T N ~ 374 K respectively. The first order magnetic transition from antiferromagnetic [AFil-type] to ferromagnetic [F(Nd)+Fmc] around T C is found in layered NdMn 1.9 Ti 0.1 Si 2 and is associated with large magnetocaloric effect. This behavior has been confirmed as a contribution of the magnetostructural coupling by using neutron and x-ray powder diffraction. The magnetic entropy change -ΔS M ~ 15.3 J kg -1 K -1 and adiabatic temperature change ΔT ad ~ 4.7 K have been determined using magnetization and specific heat measurement under 0-5 T applied fields. This compound exhibits almost no thermal and magnetic hysteresis, thus potentially applicable in low temperature region for magnetic refrigerator material.

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Effects of Cu substitution on structural and magnetic properties of La0.7Pr0.3Fe11.4Si1.6 compounds

Cited by 26 publications

References 31 publications

Effect on Heat Treatment and Doping of Cubic NaZn13-Type La0.7Pr0.3(Fe,Si)13 for Magnetic Refrigerator Application

Effect on Heat Treatment and Doping of Cubic NaZn13-Type La0.7Pr0.3(Fe,Si)13 for Magnetic Refrigerator Application

Magnetic phase transitions and entropy change in layered NdMn1.7Cr0.3Si2

Magnetic Properties and Magnetocaloric Effect in Layered NdMn<sub>1.9</sub>Ti<sub>0.1</sub>Si<sub>2</sub>

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