Correlation between structural and transport properties of electron beam irradiated PrMnO3 compounds

Christopher, Benedict; Rao, Ashok; Nagaraja, B.S.; Prasad, K. J. Rajendra; Okram, G. S.; Sanjeev, Ganesh; Petwal, Vikash Chandra; Verma, Vijay Pal; Dwivedi, Jishnu; Poornesh, P.

doi:10.1016/j.ssc.2017.11.007

Cited by 17 publications

(4 citation statements)

References 52 publications

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“…Easy and less-costly computational methods are highly significant for the practical implementation of this sustainable cooling system. Research efforts focused on the identification of potential magnetic materials with promising magnetocaloric effects and RCP have led to the exploration of many compounds, such as manganite-based compounds, Gd-based materials, spinel ferrites, Ni-Mn-based Heusler alloys and La-Fe-Si-based alloys, among others [10][11][12][13][14]. Each of these materials has their associated disadvantages for cooling applications.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic materials with diverse functionalities have attracted attention lately due to their potential for application in various domains [15]. Among these functional magnetic materials are Gd-based compounds, Ni-Mn-based Heusler alloys, manganite-based compounds, La-Fe-Si-based alloys and spinel ferrites, among others [10][11][12][13][14]. Magnetic properties, such as large magnetocaloric effects and a huge relative cooling power around room temperature, are the controlling factors of importance when choosing magnetic materials for cooling applications [16].…”

Section: Introductionmentioning

confidence: 99%

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Single Hidden Layer Intelligent Approach to Modeling Relative Cooling Power of Rare-Earth-Transition-Metal-Based Refrigerants for Sustainable Magnetic Refrigeration Application

Alqahtani

2024

Sustainability

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Solid-state magnetocaloric-based magnetic refrigeration offers green and sustainable refrigeration with improved efficiency, compactness and environmental friendliness compared with commercialized gas compression refrigeration systems. Relative cooling power (RCP) plays a significant role in the candidature of any magnetic material refrigerants in this application, while the tunable physical and magnetic properties of rare-earth-transition-metal-based materials strengthen the potential of these materials to be used in a cooling system. This work develops single hidden layer (SIL) extreme learning machine intelligent models for predicting the RCP of rare-earth-transition-metal-based magnetocaloric compounds using elemental constituent ionic radii (IR) and maximum magnetic entropy change (EC) descriptors. The developed model based on the sine (SN) activation function with ionic radii (IR) descriptors (SN-SIL-IR) shows superior performance over the sigmoid (SG) activation function-based model, represented as SG-SIL-IR, with performance improvements of 71.86% and 69.55% determined using the mean absolute error (MAE) and root mean square error (RMSE), respectively, upon testing rare-earth-transition-metal-based magnetocaloric compounds. The developed SN-SIL-IR further outperforms the SN-SIL-EC and SG-SIL-EC models which employed maximum magnetic entropy change (EC) descriptors with improvements of 45.74% and 24.79%, respectively, on the basis of MAE performance assessment parameters. Estimates of the developed model agree well with the measured values. The dependence of the RCP on an applied magnetic field for various classes of rare-earth-transition-metal-based magnetocaloric compounds is established using a developed SN-SIL-IR model. The improved precision of the developed SN-SIL-IR model, coupled with ease of its descriptors, will strengthen and facilitate the comprehensive exploration of rare-earth-transition-metal-based magnetocaloric compounds for their practical implementation as magnetic refrigerants for promoting a sustainable system of refrigeration that is known to be efficient and environmentally friendly.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Single Hidden Layer Intelligent Approach to Modeling Relative Cooling Power of Rare-Earth-Transition-Metal-Based Refrigerants for Sustainable Magnetic Refrigeration Application

Alqahtani

2024

Sustainability

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“…Firstly, the electron-hole generation may occur, creating defects, which in turn provoke changes in the microstructure and electronic distribution of the material. Secondly, it may also lead to the formation of phase segregation and lattice defects, such as the production of vacancies [23,[33][34][35] defect clusters and dislocations [36][37][38][39][40], which modify the crystal lattice of the material. Therefore, there is still plenty of room for significant improvements to gain more insight into the behavior of the materials under EB irradiation .…”

Section: Introductionmentioning

confidence: 99%

A scalable electron beam irradiation platform applied for allotropic carbon transformation

Costa

Teodoro

Assis

et al. 2021

Carbon

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“…Several scientific reports have illustrated that properties of manganites are sensitive to external perturbations like pressure, irradiation with energetic particles like ions, electrons, neutron, x-ray, and lasers [14][15][16][17][18]. Ion and electron beam irradiations are observed to be instrumental in producing defects such as vacancies, dislocations, and defect clusters, which in turn induce significant deviation in the microstructure as well as the distribution of oxygen vacancies in the material [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Plasma augmented structural and electrical properties of half doped neodymium strontium manganites

Chettri

Sarma²,

Okram

et al. 2020

Phys. Scr.

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The reduction in resistivity and modification of the thermoelectric power of perovskite oxides is in continuous demand because of its large scale industrial applications. Currently, electron or ion beam irradiations are the most preferred methods employed to improve its properties. The quantum of improvement achieved with these methods is appreciable, however, it involves intriguing technicalities in the production of the beams. Plasma is a natural medium with the presence of both electrons and ions that can be easily produced using the glow discharge technique. In this work, the effect of oxygen plasma exposure on the structural properties, electrical resistivity, and thermopower of Nd0.5Sr0.5MnO3 manganites is investigated. Powdered Nd0.5Sr0.5MnO3 manganites samples are prepared using the solid-state reaction method. It is found that plasma exposure has changed the lattice parameters thereby varying the cell volume, which are not normally seen in the case of electron beam exposure. Further, the electrical resistivity is observed to decrease significantly after plasma exposure that changed the transport properties. It is also observed that plasma exposure decreases the absolute value of thermopower at low temperatures but increases it at high temperatures.

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Correlation between structural and transport properties of electron beam irradiated PrMnO3 compounds

Cited by 17 publications

References 52 publications

Single Hidden Layer Intelligent Approach to Modeling Relative Cooling Power of Rare-Earth-Transition-Metal-Based Refrigerants for Sustainable Magnetic Refrigeration Application

Single Hidden Layer Intelligent Approach to Modeling Relative Cooling Power of Rare-Earth-Transition-Metal-Based Refrigerants for Sustainable Magnetic Refrigeration Application

A scalable electron beam irradiation platform applied for allotropic carbon transformation

Plasma augmented structural and electrical properties of half doped neodymium strontium manganites

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