Journal ArticleDOI
Influence of electron beam irradiation on the structural, electrical and thermal properties of Gd0.5Sr0.5MnO3 and Dy0.5Sr0.5MnO3 manganites
TLDR
In this paper, the effect of electron beam irradiation on structural, electrical and thermal properties of Gd0.5Sr 0.5MnO3 manganites was investigated.Abstract:
We present systematic studies on the effect of electron beam irradiation on structural, electrical and thermal properties of Gd0.5Sr0.5MnO3 and Dy0.5Sr0.5MnO3 manganites. The XRD patterns and Rietveld analysis show that the samples remain single phased even after they undergo electron beam irradiation. Both the series of the samples Gd0.5Sr0.5MnO3 and Dy0.5Sr0.5MnO3 show insulating trends in their temperature dependent electrical resistivity, ρ(T) behavior. The resistivity data for both the series of samples (pristine as well as irradiated) indicate that the small polaron hopping model is valid in high temperature region; on contrary, variable range hopping model governs the low temperature regime. Magnetic studies demonstrate that the Neel temperatures of pristine and irradiated samples of Gd0.5Sr0.5MnO3 and Dy0.5Sr0.5MnO3 do not change appreciably when they are subjected to irradiation. Thermo-electrical power is observed to increase with irradiation in Gd0.5Sr0.5MnO3 samples, whereas for Dy0.5Sr0.5MnO3 samples a decrease in thermo-electric power is seen when the samples are irradiated.read more
Citations
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Journal ArticleDOI
Multi-layered-stack thermoelectric generators using p-type Sb 2 Te 3 and n-type Bi 2 Te 3 thin films by radio-frequency magnetron sputtering
Ken Takayama,Masayuki Takashiri +1 more
TL;DR: In this paper, a multi-layered-stack thermoelectric generator using radio-frequency (RF) magnetron sputtering was constructed using glass substrates and thermal annealing at temperatures ranging from 200 to 400°C.
Journal ArticleDOI
Highly oriented crystal growth of nanocrystalline bismuth telluride thin films with anisotropic thermoelectric properties using two-step treatment
TL;DR: In this article, a two-step treatment combining homogeneous electron beam (EB) irradiation and thermal annealing was proposed to enhance the thermoelectric performance of materials with anisotropic structures.
Journal ArticleDOI
Structural, magnetic, magnetocaloric and electrical studies of Dy 0.5 (Sr 1-x Ca x ) 0.5 MnO 3 manganites
TL;DR: Based on sol-gel method, the Dy 0.5 (Sr 1−x Ca x ) 0.3 manganites were synthesized as discussed by the authors, showing antiferromagnetic coupling among Mn-spins.
Journal ArticleDOI
Resistivity, I–V characteristics and Hall effect in Dy0.5(Sr1-xCax)0.5MnO3 manganites
TL;DR: In this article, Dy 0.5 (Sr 1-x Ca x ) 0.3 was synthesized using sol-gel method and both samples exhibited an insulating behavior in the whole temperature range.
Journal ArticleDOI
Correlation between structural and transport properties of electron beam irradiated PrMnO3 compounds
Benedict Christopher,Ashok Rao,B.S. Nagaraja,K. Shyam Prasad,Gunadhor S. Okram,Ganesh Sanjeev,Vikash Chandra Petwal,Vijay Pal Verma,Jishnu Dwivedi,P. Poornesh +9 more
TL;DR: In this article, the structural, electrical, magnetic, and thermal properties of electron beam (EB) irradiated PrMnO3 manganites were investigated using X-ray diffraction data.
References
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Review of the magnetocaloric effect in manganite materials
Manh-Huong Phan,Seong-Cho Yu +1 more
TL;DR: In this article, a new class of magnetocaloric material, that is, the ferromagnetic perovskite manganites (R1−xMxMnO3, where R=La, Nd, Pr and M=Ca, Sr, Ba, etc.).
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Ln1−xSrxCoO3(Ln = Sm, Dy) for the electrode of solid oxide fuel cells
TL;DR: In this article, perovskite-type oxides were synthesized in the series of Ln 1− x Sr x CoO 3 (Ln = Sm, Dy) and the electrical conductivities of the sintered samples were measured as a function of x in the temperature range 30 to 1000 °C.
Journal ArticleDOI
Ln1−xSrxMnO3 (Ln=Pr, Nd, Sm and Gd) as the cathode material for solid oxide fuel cells
Yoshinori Sakaki,Y. Takeda,A Kato,Nobuyuki Imanishi,Osamu Yamamoto,Masatoshi Hattori,M Iio,Yoshimi Esaki +7 more
TL;DR: In this article, the perovskite type manganite systems, Ln1−xSrxMnO3 (Ln=La, Pr, Nd, Sm, and Gd; 0 ≤ x ≤ 0.5 ) were studied as the electrode materials for solid oxide fuel cells (SOFC) from the view point of applications to the co-firing process of the electrolyte and electrode at a higher temperature.
Journal ArticleDOI
High performance magnetocaloric perovskites for magnetic refrigeration
Christian R.H. Bahl,David Velázquez,Kaspar Kirstein Nielsen,Kurt Engelbrecht,Kjeld Bøhm Andersen,Regina Bulatova,Nini Pryds +6 more
TL;DR: In this article, the authors applied mixed valance manganite perovskites as magnetocaloric materials in a magnetic refrigeration device, and observed temperature spans above 9 K with two materials.
Journal ArticleDOI
Electronic and magnetic properties of R 0.5 A 0.5 MnO 3 compounds ( R = Gd , Dy, Ho, Er; A = Sr , Ca)
Tomoyuki Terai,T. Sasaki,Tomoyuki Kakeshita,Takashi Fukuda,Toshio Saburi,Hiroshi Kitagawa,K. Kindo,Makoto Honda +7 more
TL;DR: The electronic and magnetic properties of perovskitelike compounds have been studied by measuring lattice parameter, electrical resistivity, magnetic susceptibility, and magnetization as discussed by the authors, and all the compounds showed a transition from a paramagnetic insulator to a spin-glass\char21{}-like insulator.