Room temperature giant electrocaloric properties of relaxor ferroelectric 0.93PMN-0.07PT thin film

Hamad, Mahmoud A.

doi:10.1063/1.4795156

Cited by 39 publications

(15 citation statements)

References 19 publications

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“…The search of new cooling principles based on solidstate phenomena and development of ecologically friendly refrigerators with the lowest power consumption are very important tasks for modern refrigeration [1][2][3][4][5][6][7][8][9][10][11][12].The magnetocaloric effect (MCE) is either an isothermal magnetic entropy change or an adiabatic temperature change, Physics Department, Faculty of Science, Tanta University, Tanta, Egypt obtained by applying an external magnetic field [13][14][15][16]. Behavior and application of the magnetic properties of ferromagnetic materials become more and more important as magnetoelectronic devices for the level of miniaturization and reliability necessary for commercialization [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effects of Addition of Rare Earth on Magnetocaloric Effect in Fe82Nb2 B 14

Hamad

2015

J Supercond Nov Magn

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Calculations of the magnetocaloric effect in Fe 82 Nb 2 B 14 RE 2 (RE = Y, Gd, Tb, and Dy) upon 0.5 T magnetic field variation have been carried out. It is found that magnetic entropy change distribution of the Fe 82 Nb 2 B 14 RE 2 is much more uniform than that of gadolinium with a large temperature span. This feature is desirable for an Ericssoncycle magnetic refrigerator. Therefore, it is suggested that at high working temperature, Fe 82 Nb 2 B 14 RE 2 samples could permit cooling applications in the automotive, aerospace, or food industries.

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Section: Introductionmentioning

confidence: 99%

Effects of Addition of Rare Earth on Magnetocaloric Effect in Fe82Nb2 B 14

Hamad

2015

J Supercond Nov Magn

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“…[33], the dashed line is a fourth-polynomial method result and the single line represent simulated data using this model. It is found that, the maximum of temperature change ( T  ) is much lower than that reported in work [33], but close to the one reported in Science where a fourth-polynomial was used [31]. In addition, the corresponding maximum of temperature change ( T  ) in our work are near the experiment result, i.e.…”

Section: The Electrocaloric Effectmentioning

confidence: 99%

Modeling of hysteresis loop and its applications in ferroelectric materials

Zhi

Chen

et al. 2018

Ceramics International

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Abstract. In order to understand the physical hysteresis loops clearly, we constructed a novel model, which is combined with the electric field, the temperature, and the stress as one synthetically parameter. This model revealed the shape of hysteresis loop was determined by few variables in ferroelectric materials: the saturation of polarization, the coercive field, the electric susceptibility and the equivalent field.Comparison with experimental results revealed the model can retrace polarization versus electric field and temperature. As a applications of this model, the calculate formula of energy storage efficiency, the electrocaloric effect, and the P(E,T) function have also been included in this article.

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“…Thus, doping with Ba0.67Sr0.33TiO3 (BST67), Ba0.71Sr0.29TiO3 (BST71), Ba0.74Sr0.26TiO3 (BST74), Ba0.77Sr0.23TiO3 (BST77) increases the intensity of the electrical field induction D which carries to enhanced ECE with quite low electric field applied. Another material chosen for the paper's purposes is 0.93PMN-0.07PT thin film [39,40] because of its giant ECE at 27°C. It is made up of the PbMg2/3Nb1/3O3 relaxor ceramic, filled with PbTiO3 (PT), to achieve a wide-range of dipolar ordering.…”

Section: The Most Promising Magnetocaloric and Electrocaloric Materialsmentioning

confidence: 99%

A comparison between electrocaloric and magnetocaloric materials for solid state refrigeration

Aprea¹,

Greco²,

Maiorino³

et al. 2017

IJHT

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Electrocaloric and magnetic refrigeration are two emerging, solid-state based technology, which could constitute a real chance to overcome vapor compression refrigeration limits. To underline the differences and the affinities concerning such solid-state techniques, in this paper electrocaloric and magnetic refrigeration are compared through some performance parameters. For this purpose, it has been introduced a two-dimensional model, capable to reproduce, in room temperature range, the behaviors of both AMR and AER parallel plates regenerator. AMR and AER are the acronyms of Active Magnetic/Electrocaloric Regenerative cycle, respectively, which are inverse Brayton based thermodynamical cycles. In the model have been tested as refrigerant the most promising magnetic and electrocaloric materials, like Gd, Gd5(SixGe1-x)4, LaFe11.384 Mn0.356Si1.26H1.52, LaFe11.05Co0.94Si1.10, as magnetocaloric, P(VDF-TrFE-CFE)/BSTs, 0.93PMN-0.07PT, PLZTs, as electrocaloric ones. Among them, the PLZT thin film class confers the best results, higher than every magnetocaloric material tested, conferring to electrocaloric refrigeration the real role of the environmental friendly technology of the future.

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Room temperature giant electrocaloric properties of relaxor ferroelectric 0.93PMN-0.07PT thin film

Cited by 39 publications

References 19 publications

Effects of Addition of Rare Earth on Magnetocaloric Effect in Fe82Nb2 B 14

Effects of Addition of Rare Earth on Magnetocaloric Effect in Fe82Nb2 B 14

Modeling of hysteresis loop and its applications in ferroelectric materials

A comparison between electrocaloric and magnetocaloric materials for solid state refrigeration

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