Magnetic properties and magnetocaloric effect of NdMn2−xCuxSi2 compounds

Din, Muhamad Faiz Md; Wang, Jianli; Avdeev, Maxim; Gu, Qinfen; Zeng, Rong; Campbell, S. J.; Kennedy, S.J.; Dou, Shi Xue

doi:10.1063/1.4864249

Cited by 18 publications

(3 citation statements)

References 16 publications

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“…In the case of a large field change, ÀDS M is spread over a wide range of temperatures due to the overlapping of the two peaks with each other resulting in a table-like form (clear in 20 kOe field change), which is very useful for application purposes. 39 The maximum value of ÀDS M observed is 11.4 J kg À1 K À1 for the 70 kOe magnetic field change, which is one of the largest or quite comparable with those of Nd-based compounds that show a large magnetocaloric effect [41][42][43][44] (Table 3). There is no saturation tendency of the ÀDS max M values up to a field strength of as high as 70 kOe.…”

Section: Isothermal Magnetization and Magnetocaloric Effectmentioning

confidence: 70%

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd₂Ni_0.94Si_2.94

Pakhira

Mazumdar

Ranganathan

et al. 2018

Phys. Chem. Chem. Phys.

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In this work, we report the synthesis of a new ternary intermetallic compound, NdNiSi, that forms in single phase only in a defect crystal structure. The compound exhibits an antiferromagnetic transition below 7.2 K (T) followed by a spin cluster freezing behaviour below 2.85 K (T), which makes the compound a reentrant spin cluster glass system. The detailed studies of dc and ac magnetization, heat capacity, non-equilibrium dynamical behaviour, viz., aging effect, temperature and field dependent magnetic relaxation and magnetic memory effect establish the compound to be a cluster-glass material below freezing temperature. The interplay between competing exchange coupling (c/a ≃ 1.04 ⇒ J ≃ J) and chemical disorder driven variation in the electronic environment among the Nd ions has been argued to be responsible for such a metastable state formation. A considerable value of MCE parameters (-ΔS ∼ 11.4 J kg K, RCP ∼ 160 J kg and ΔT ∼ 5.2 K for a field change of 70 kOe) is obtained for this magnetically frustrated glassy compound.

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Section: Isothermal Magnetization and Magnetocaloric Effectmentioning

confidence: 70%

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd₂Ni_0.94Si_2.94

Pakhira

Mazumdar

Ranganathan

et al. 2018

Phys. Chem. Chem. Phys.

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“…Materials with first-order magnetic phase transitions (FOMT) are of particular interest as the discontinuous character of the transition can lead to intrinsically large MCE values [1][2]. Among the relatively low-cost 3d metal-based compounds materials whose MCE response at such FOMT has been explored are MnAs1−xSbx [3][4] MnFeP0.45As0.55 [5], La(Fe1−xSix)13 and its hydrides [6] as well as MnCoGe-based compounds [7][8]. In order to fully understand the effects milling time for Mn on the structural and electrical properties of MnCoGe, here we present the results of a detailed investigation of the structural and electrical properties of MnCoGe by x-ray diffraction and impedance analyser measurements…”

Section: Introductionmentioning

confidence: 99%

Study of Heat Treatment Effect in MnCoGe Compound on Stucture and Electric Properties

Din

Jusoh

Rahman

et al. 2020

MSF

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A comprehension about magnetic refrigeration which develops strong materials as the refrigerant will be explained and develop in this project. Magnetic refrigeration comes from magnetocaloric effect (MCE) which is magnetic material known as refrigerant that react with a magnetic and demagnetic field. Refrigerant plays the roll in control the performance of magnetic refrigerator. One of interesting refrigerant is MnCoGe compound which found very favourable in produce high value of MCE. From this point of view, the process of producing of MnCoGe using ball milling treatment and heat treatment had been studied. Variable of temperature in heat treatment process and following by cooling down to room temperature have been implemented in order to produce good structure of MnCoGe compound. Furthermore, from structure properties measurement found this compound produce three type of structures which are hexagonal, orthorhombic and mix structure (hexagonal and orthorhombic). Based on the different temperature of heat treatment, it indicate for 1500o C and 1200o C treatment are dominant to the hexagonal structure type, then for 1000o C dominant to the orthorhombic structure and lastly for 1100o C dominant to mix structure. Electric properties measurement found the frequency play the role in change the structure as well as in 1000o C compound was found below 5M Hz frequency show the hexagonal structure and when increasing above 5M Hz the pattern change to orthorhombic structure respectively. Moreover, for the permittivity measurement it gives the information about conductivity and tan delta value. Systematically at 1000o C compound found this material is more to conductor behavior compare others compound. Therefore, when the temperature is increased to 1100o C, 1200o C and 1500o C then the conductivity value decreasing and its resistivity value become increasing.

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“…Research on near-room-temperature magnetic cooling which related to magnetocaloric effect (MCE) phenomena has been a favorable increase nowadays [1,2]. This MCE process, will supersede the conventional refrigeration technology based on gas operation which its special interest because of considerable socio-economic benefits and high efficiency on performance [3,4]. Material systems which use as refrigerant such as LaFeSi [5], NiMnGa [6], MnAsSb [7], CeMn2Ge2-xSix [8] and GdSiGe [9] undergo first-order magnetic transitions and have been found to possess a giant MCE.…”

Section: Introductionmentioning

confidence: 99%

Systematically study on the magnetism and critical behaviour of layered NdMn1.4Cu0.6Si2

Din

Wang

Norizan

et al. 2018

AIP Conference Proceedings

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The strong dependence of the field-induced on the body-centered tetragonal ThCr2Si2-type and the critical behaviour of magnetic phase transition in NdMn2-xCuxSi2based compounds guide us to study the substitution Mn (atomic radius = 1.35 Å) by Cu (atomic radius = 1.28 Å) in layered NdMn1.4Cu0.6Si2compound. Room temperature x-ray diffraction study indicates clearly that most of the reflections can be identified with ThCr2Si2-type structure with space group I4/mmm. It found lattice parameters a slightly increases and lattice parameter c decrease compare to NdMn2Si2as indicated the decreasing of volume structure. The Neel temperature TNis found at 340 K while Curie temperature TCfound at 75 K respectively. The increasing concentration of Cu in replacement of Mn changes the magnetic phase transition from first order type for NdMn2Si2to second order type for layered NdMn1.4Cu0.6Si2compound as been determined by particular the S-shaped nature of the Arrott plot near TC. Our results indicate that the magnetic-field-induced magnetic phase transition plays a critical role on producing large magnetocaloric effect in these systems especially on second order type as the key for further investigation. The critical behaviour analysis in the vicinity of TCdemonstrates that the magnetism of the layered NdMn1.4Cu0.6Si2compound is governed by long range interactions.

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Magnetic properties and magnetocaloric effect of NdMn2−xCuxSi2 compounds

Abstract: Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds

Cited by 18 publications

References 16 publications

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd₂Ni_0.94Si_2.94

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd₂Ni_0.94Si_2.94

Study of Heat Treatment Effect in MnCoGe Compound on Stucture and Electric Properties

Systematically study on the magnetism and critical behaviour of layered NdMn1.4Cu0.6Si2

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Magnetic properties and magnetocaloric effect of NdMn2−xCuxSi2 compounds

Abstract: Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds Magnetic properties and magnetocaloric effect of NdMn2-xCuxSi2 compounds

Cited by 18 publications

References 16 publications

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd2Ni0.94Si2.94

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd2Ni0.94Si2.94

Study of Heat Treatment Effect in MnCoGe Compound on Stucture and Electric Properties

Systematically study on the magnetism and critical behaviour of layered NdMn1.4Cu0.6Si2

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Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd₂Ni_0.94Si_2.94

Chemical disorder driven reentrant spin cluster glass state formation and associated magnetocaloric properties of Nd₂Ni_0.94Si_2.94