Magnetocaloric effect in pristine and Bi-doped Pr0.6Sr0.4MnO3 manganite

Daivajna, Mamatha D.; Rao, Ashok

doi:10.1016/j.ssc.2016.07.019

Cited by 19 publications

(10 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The variation in the Mn-O-Mn bond angle and Mn-O bond length with temperature results in the volume change, thereby influencing the ΔS values. A comparison of the obtained ΔS M with few reported studies is summarized in table 4 [77][78][79][80][81][82][83][84]. The ΔS M value in the present study is less compared to PSMO which indicates that Bi 3+ addition suppresses the net magnetization of the system.…”

Section: S H Tsupporting

confidence: 45%

Finite-size effects on the evolution of magnetic correlations and magnetocaloric properties of Pr0.4Bi0.2Sr0.4MnO3

2021

Self Cite

View full text Add to dashboard Cite

The effect of particle size reduction on the magnetic correlations of Pr0.4Bi0.2Sr0.4MnO3 nanoparticles prepared by top-down approach has been studied in detail. It was observed that as the milling time increases from 0 to 240 min, particle size decreases from 160 to 12 nm. Correspondingly it was observed that the ferromagnetic transition temperature (TC) drops (264 to 213 K) and saturation magnetization (MS) decreases (2.12–0.41 $${\upmu }_{\mathrm{B}}/\mathrm{f}.\mathrm{u}.$$ μ B / f . u . ) while coercivity (HC) shows a monotonous increase (0.18–1.5 kOe) as the particle size decreases due to increase in milling. The magnetic entropy change (ΔS) also decreases (2.41–0.24 J/kg-K) as particle size decreases indicating a strong correlation between magnetism and particle size. The metamagnetic M–H response of the bulk sample, which signifies the magnetic phase coexistence, is suppressed, and the nature of magnetic interactions demonstrates a transition from long range to short range. The observed characteristics emphasizes that with particle size reduction there is an increase in the surface disorder which can be explained by considering the core–shell model for the nanoparticles. Graphic abstract

show abstract

Section: S H Tsupporting

confidence: 45%

Finite-size effects on the evolution of magnetic correlations and magnetocaloric properties of Pr0.4Bi0.2Sr0.4MnO3

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…A comparison of obtained values of DS from the present study with a few reported literature [61][62][63][64][65][66][67][68][69][70][71] is summarized in Table 3. The DS M for bulk PSMO estimated from our samples is slightly higher compared to those reported by Zemni et al [70] and Mamatha et al [71] probably due to the different sample synthesis conditions. Even though compared to Gd and La 0.6 Dy 0.1 Sr 0.3-MnO 3 , the observed DS M in the present study seems smaller, but is comparable to other related systems.…”

Section: Magnetocaloric Studiesmentioning

confidence: 78%

Tuning magnetic and magnetocaloric properties of Pr0.6Sr0.4MnO3 through size modifications

Souza

Vagadia

Daivajna

2021

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Particle size as an effective tool for controlling the magnetic and magnetocaloric properties of Pr0.6Sr0.4MnO3 samples has been studied. In the present work, a direct influence of particle size on the magnitude of magnetization and magnetic transition temperature, TC, can be seen. The TC drops from 309 to 242 K, while the saturation magnetization (MS) decreases from 3.6 to 0.5 μB/f.u. as the particle changes from 120 to 9 nm. Concurrently, coercivity (HC) exhibits a drastic rise emphasizing the enhanced surface disorder in the nanoparticles. Another interesting observation is in the magnetic entropy change, ΔS, which though decreases in magnitude from 5.51 to 3.90 J/Kg-K as particle size decreases from 120 to 30 nm, but the temperature range of ΔS (i.e., relative cooling power, RCP) increases from 184.33 to 228.85 J/Kg. Such interplay between magnitude and wider temperature range of ΔS, which can be fine-tuned by particle size, provides an interesting tool for using surface spin disorder, as a control mechanism in modifying physical properties.

show abstract

“…Как было сказано выше, манганиты представляют большой интерес как материалы с гигантскими зна-чениями МКЭ, поэтому значительная часть работ по- священа именно исследованию магнитокалорических свойств [10][11][12][13]15,16,22]. Величина МКЭ для одного и того же химического состава колеблется у разных авторов от 1.55 J/kg · K в [16] до 2.9 J/kg · K в [15] в магнитном поле 2 T (см.…”

Section: результаты и обсуждениеunclassified

Теплоемкость и магнитокалорический эффект в манганитах Pr-=SUB=-0.6-=/SUB=-Sr-=SUB=-0.4-=/SUB=-Mn-=SUB=-1-x-=/SUB=-Fe-=SUB=-x-=/SUB=-O-=SUB=-3-=/SUB=-

Gamzatov¹,

Batdalov²,

Алиев³

et al. 2017

Физика Твердого Тела

View full text Add to dashboard Cite

Представлены результаты исследования теплоемкости и магнитокалорического эффекта в манганитах Pr 0.6 Sr 0.4 Mn 1−x Fex O 3 (x = 0 и 0.1) в интервале температур 80−350 K и в магнитных полях до 18 kOe. Магнитокалорический эффект оценен двумя независимыми методами: метод модуляции магнитного поля (прямой метод) и из данных теплоемкости в магнитном поле и без поля (косвенный метод). При замещении атомов Mn атомами Fe (x = 0.1) T C смешается на 167 K в сторону низких температур, при этом величина МКЭ в магнитном поле 18 kOe меняется незначительно с SM = 2.05 J/kg · K и 2.31 J/kg · K для x = 0 и 0.10 соответственно.Работа выполнена в рамках государственного задания ФАНО России (№ 0203-2016-0009) с использовани-ем оборудования Аналитического центра коллективного пользования Дагестанского научного центра РАН.

show abstract

Magnetocaloric effect in pristine and Bi-doped Pr0.6Sr0.4MnO3 manganite

Cited by 19 publications

References 21 publications

Finite-size effects on the evolution of magnetic correlations and magnetocaloric properties of Pr0.4Bi0.2Sr0.4MnO3

Finite-size effects on the evolution of magnetic correlations and magnetocaloric properties of Pr0.4Bi0.2Sr0.4MnO3

Tuning magnetic and magnetocaloric properties of Pr0.6Sr0.4MnO3 through size modifications

Теплоемкость и магнитокалорический эффект в манганитах Pr-=SUB=-0.6-=/SUB=-Sr-=SUB=-0.4-=/SUB=-Mn-=SUB=-1-x-=/SUB=-Fe-=SUB=-x-=/SUB=-O-=SUB=-3-=/SUB=-

Contact Info

Product

Resources

About