Magnetic Properties of Perovskite Manganites and Their Modifications

Markovich, V.; Wiśniewski, A.; Szymczak, H.

doi:10.1016/b978-0-444-63291-3.00001-5

Cited by 75 publications

(33 citation statements)

References 616 publications

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“…The large (giant) magnetocaloric eect near the room temperature was discovered in several families of compounds [2]. Among them, especially interesting are manganites [3]. In contrast to other compounds with the giant magnetocaloric eect, most of the manganites are characterized by the second order paramagnet ferromagnet phase transition.…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric Effect in La_0.8Sr_0.2MnO₃Film

et al. 2015

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Thin epitaxial lm of La0.8Sr0.2MnO3 has been deposited on yz-cut LiNbO3 by pulsed laser ablation. The lm was characterized by X-ray diraction and magnetic measurements as a single phase. The magnetic properties and the magnetocaloric eect have been measured as a function of magnetic eld and temperature. A reasonably high magnetocaloric eect indicates that this lm might provide an ecient material for micro magnetic refrigerators.

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Section: Introductionmentioning

confidence: 99%

Magnetocaloric Effect in La_0.8Sr_0.2MnO₃Film

et al. 2015

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“…The heating curve (Supplementary Figure 5) of the anti-ferromagnetic 23 (at room temperature) parent compound LMO, is almost indistinguishable from the blank curve. Hence we have attributed any variation of the heating profiles from the blank as being due to the dopant A-site cation.…”

Section: Magnetic Heating Experimentsmentioning

confidence: 91%

Synthesis, characterisation and study of magnetocaloric effects (enhanced and reduced) in manganate perovskites

McBride

Partridge

Bennington-Gray

et al. 2017

Materials Research Bulletin

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Highlights• La1-xCaxMnO3 and La1-xBaxMnO3 synthesised using the modified peroxide sol-gel synthesis.• Enhanced magnetic heating for manganates doped with A-site cations larger than La 3+ .• Reduced magnetic heating observed for manganates doped with A-site cations smaller than La 3+ . 1 AbstractThe effect of the A-site dopant ionic radii on the observed magnetocaloric effect (MCE) exhibited by three different families of manganese-based perovskites was investigated using both induction heating and SQUID magnetometry measurements. The doped perovskites La1-xSrxMnO3 (LSMO), La1-xCaxMnO3 (LCMO), and La1-xBaxMnO3 (LBMO) (x = 0.25, 0.35, 0.4) were prepared using a modified peroxide sol-gel synthesis. This method has not been previously used for the synthesis of LCMO or LBMO. Structural characterisation of the agglomerates of magnetic nanoparticles (MNP) for each material was carried out using SEM, XRD and IR spectroscopy. Magnetic heating was observed for materials with larger A-site dopant radii relative to La 3+ ; LSMO40 and LBMO40, with average SARs obtained of 51.5 Wg -1 Mn and 33.8Wg -1 Mn respectively. However, reduced magnetic heating effects were observed for smaller A-site dopant radii relative to La 3+ (LCMO). In fact, the calculated Specific Absorption Rate for LCMO40 of 14.72 Wg -1 Mn is half that of the blank.

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“…В то же время, манганиты являются яркими предста-вителями материалов с гигантскими величинами магни-токалорического эффекта (МКЭ), что делает их потен-циальными кандидатами для использования в техноло-гии магнитного охлаждения [2][3][4][5].…”

Section: Introductionunclassified

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

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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.

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Magnetic Properties of Perovskite Manganites and Their Modifications

Cited by 75 publications

References 616 publications

Magnetocaloric Effect in La_0.8Sr_0.2MnO₃Film

Magnetocaloric Effect in La_0.8Sr_0.2MnO₃Film

Synthesis, characterisation and study of magnetocaloric effects (enhanced and reduced) in manganate perovskites

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=-

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Magnetic Properties of Perovskite Manganites and Their Modifications

Cited by 75 publications

References 616 publications

Magnetocaloric Effect in La0.8Sr0.2MnO3Film

Magnetocaloric Effect in La0.8Sr0.2MnO3Film

Synthesis, characterisation and study of magnetocaloric effects (enhanced and reduced) in manganate perovskites

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=-

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Magnetocaloric Effect in La_0.8Sr_0.2MnO₃Film

Magnetocaloric Effect in La_0.8Sr_0.2MnO₃Film