Multiferroicity and magnetoelectric coupling enhanced large magnetocaloric effect in DyFe0.5Cr0.5O3

Yin, Lihua; Yang, Jin; Zhang, R. R.; Dai, Jingying; Song, Wanling; Sun, Yuan

doi:10.1063/1.4862665

Cited by 92 publications

(79 citation statements)

References 26 publications

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“…The magnetic feature around 261 K, reported in Ref. 19 is very weak in our samples, and it could be seen in the dχ/dT vs. T plot only (inset of Fig 2(a)). The derivative plots in figure 2 (c) also bring out the transitions around 13 K and around 120 K.…”

Section: Methodsmentioning

confidence: 85%

“…DyFe 0.5 Cr 0.5 O 3 is found to undergo magnetic transitions at ~ 261, 121 and 13 K, as reported in Ref. [19,20]. Here, we focus on the magnetic transitions around 13 and 121 K only, as the effect of rare-earth substitution on the magnetic, multiferroic and magnetocaloric properties cannot be clearly tracked due to the weakness of the magnetic features around the 261 K magnetic transition.…”

Section: Introductionmentioning

confidence: 98%

“…The low value of R-factors and goodness of fit shows good agreement between calculated and observed patterns. [19,20] that this compound undergoes distinctly two magnetic transitions, one around ~121 K (T 1 ) and the other at ~13 K (T 2 ). The magnetic feature around 261 K, reported in Ref.…”

Section: Methodsmentioning

confidence: 99%

“…In this article, we focus on half-doped orthochromite, DyFe 0.5 Cr 0.5 O 3 , which was established to be a multiferroic material, exhibiting an enhanced magnetocaloric effect due to magnetoelectric coupling [19]. However, reports about the evolution of magnetic and multiferroic properties due to the nature of rare-earth ions in such a half-doped orthochromite is lacking in literature.…”

Section: Introductionmentioning

confidence: 99%

“…Such investigations revealed multiferroic behaviour in these materials [14][15]. A new class of half-doped orthochromites, LnFe 0.5 Cr 0.5 O 3 , Ln = rare-earths [16], have also been studied because of potential application in magnetic data storage, multiple-state memories and magnetic refrigeration [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Sharma

Basu

Mukherjee

et al. 2016

J. Phys.: Condens. Matter

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We report the results of our investigations on the influence of partial substitution of Er and Gd for Dy on the magnetic and magnetoelectric properties of DyFe 0.5 Cr 0.5 O 3 , which is known to be a multiferroic system. Magnetic susceptibility and heat capacity data, apart from confirming the occurrence of magnetic transitions at ~ 121 and 13 K in DyFe 0.5 Cr 0.5 O 3 , bring out that the lower transition temperature only is suppressed by rare-earth substitution.Multiferroic behavior is found to persist in Dy 0.4 Ln 0.6 Fe 0.5 Cr 0.5 O 3 (Ln= Er and Gd). There is an evidence for magnetoelectric coupling in all these materials with qualitative differences in its behavior as the temperature is changed across these two transitions. Remnant electric polarization is observed for all the compounds. The most notable observation is that electric polarization is seen to get enhanced as a result of rare-earth substitution with respect to that in DyFe 0.5 Cr 0.5 O 3 . Interestingly, similar trend is seen in magnetocaloric effect, consistent with the existence of magnetoelectric coupling. The results thus provide evidence for the tuning of magnetoelectric coupling by rare-earth substitution in this family of oxides.2

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Section: Methodsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Sharma

Basu

Mukherjee

et al. 2016

J. Phys.: Condens. Matter

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Correlation between Electronic Defect States Distribution and Device Performance of Perovskite Solar Cells

et al. 2017

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In the present study, random current fluctuations measured at different temperatures and for different illumination levels are used to understand the charge carrier kinetics in methylammonium lead iodide CH3NH3PbI3‐based perovskite solar cells. A model, combining trapping/detrapping, recombination mechanisms, and electron–phonon scattering, is formulated evidencing how the presence of shallow and deeper band tail states influences the solar cell recombination losses. At low temperatures, the observed cascade capture process indicates that the trapping of the charge carriers by shallow defects is phonon assisted directly followed by their recombination. By increasing the temperature, a phase modification of the CH3NH3PbI3 absorber layer occurs and for temperatures above the phase transition at about 160 K the capture of the charge carrier takes place in two steps. The electron is first captured by a shallow defect and then it can be either emitted or thermalize down to a deeper band tail state and recombines subsequently. This result reveals that in perovskite solar cells the recombination kinetics is strongly influenced by the electron–phonon interactions. A clear correlation between the morphological structure of the perovskite grains, the energy disorder of the defect states, and the device performance is demonstrated.

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Effect of Precursor Solution Aging on the Crystallinity and Photovoltaic Performance of Perovskite Solar Cells

Tsai

Nie

Lin

et al. 2017

Advanced Energy Materials

138

104

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International audiencePerovskite materials due to their exceptional photophysical properties are beginning to dominate the field of thin-film optoelectronic devices. However, one of the primary challenges is the processing-dependent variability in the properties, thus making it imperative to understand the origin of such variations. Here, it is discovered that the precursor solution aging time before it is cast into a thin film, is a subtle but a very important factor that dramatically affects the overall thin-film formation and crystallinity and therein factors such as grain growth, phase purity, surface uniformity, trap state density, and overall solar cell performance. It is shown that progressive aging of the precursor promotes efficient formation of larger seeds after the fast nucleation of a large density of small seeds. The hot-casting method then leads to the growth of large grains in uniform thin-films with excellent crystallinity validated using scanning microscopy images and X-ray diffraction patterns. The high-quality films cast from aged solution is ideal for thin-film photovoltaic device fabrication with reduced shunt current and good charge transport. This observation is a significant step toward achieving highly crystalline thin-films with reliability in device performance and establishes the subtle but dramatic effect of solution aging before fabricating perovskite thin-films

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Multiferroicity and magnetoelectric coupling enhanced large magnetocaloric effect in DyFe0.5Cr0.5O3

Cited by 92 publications

References 26 publications

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Correlation between Electronic Defect States Distribution and Device Performance of Perovskite Solar Cells

Effect of Precursor Solution Aging on the Crystallinity and Photovoltaic Performance of Perovskite Solar Cells

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Multiferroicity and magnetoelectric coupling enhanced large magnetocaloric effect in DyFe0.5Cr0.5O3

Cited by 92 publications

References 26 publications

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe0.5Cr0.5O3

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe0.5Cr0.5O3

Correlation between Electronic Defect States Distribution and Device Performance of Perovskite Solar Cells

Effect of Precursor Solution Aging on the Crystallinity and Photovoltaic Performance of Perovskite Solar Cells

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Product

Resources

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Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃

Effect of rare-earth (Er and Gd) substitution on the magnetic and multiferroic properties of DyFe_0.5Cr_0.5O₃