Tuning of normal and inverse magnetocaloric effect in Sm0.35Pr0.15Sr0.5MnO3 phase separated manganites

Giri, Santanab; Dasgupta, Pallab; Poddar, A.; Nath, T. K.

doi:10.1016/j.jallcom.2015.01.118

Cited by 18 publications

(6 citation statements)

References 43 publications

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“…3b-d). The similar behavior was also observed in Sm-doped manganites reported earlier by different groups [22,[25][26][27]. The decrease of the overall net magnetization behavior is attributed to the antiparallel coupling of 3d spins of Mn sublattice and 4f spins of Sm sublattice [27].…”

Section: Resultssupporting

confidence: 88%

See 1 more Smart Citation

Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Çetin

Acet

Güneş

et al. 2015

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 88%

“…Table 2. These values are larger than those reported for Pb or Sm substituted perovskite materials [26,37,40].…”

Section: Series M(h) Data Are Taken Up To 5 T At Various Temperaturecontrasting

confidence: 68%

Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Çetin

Acet

Güneş

et al. 2015

Journal of Alloys and Compounds

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“…Thus, nanocrystalline N i95 Cr 5 layers with varying thicknesses may be operated in magnetic refrigeration that uses magnetization and demagnetization processes to exploit both positive and negative magnetic entropy variations. Although our observed values of the conventional MCE and IMCE are not large but comparable to many La 0.7 Sr 0.3 MnO 3 /SrTiO 3 thin film [23], Sm 0.35 Pr 0.15 Sr 0.5 MnO 3 bulk and nanometric systems [24], the effect of a giant working temperature window may lead to the enhancement of relative cooling power (RCP). The RCP is an important performance metric of MCE materials that measure the amount of heat transferred between the hot and cold reservoirs in one refrigeration cycle [25,26].…”

Section: Xrd Pattern Of Nanocrystallinementioning

confidence: 55%

Coexistence of normal and inverse magnetocaloric effect in inhomogeneous Ni₉₅Cr₅ layers

et al. 2023

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Understanding of the coexistence of normal and inverse magnetocaloric effects (MCE) makes it promising for use in magnetic cooling applications. This study discusses the selection of Ni95Cr5 layers and their expected magnetocaloric effects for an extended temperature range (200 - 800 K). These layers offer a wide range of suitable magnetic ordering temperatures as a function of thicknesses. A modified phenomenological model was used to estimate the entropy changes (∆SM) at non-cryogenic and cryogenic ordering temperatures. The ΔS values increase somewhat with increasing thickness due to enhanced magnetization values. Under adiabatic magnetic field variation, normal and inverse MCE are computed near the ferromagnetic-paramagnetic and spin glass transition temperatures, respectively. Based on their ∆Smax values (= -0.06 to 0.11 J/kg-K) and relative cooling power (RCP = 7.6 to 15.5 J/kg) at the smallest magnetic field of 0.5 kOe, which are comparable to other MCE layer materials. The current study demonstrates that adjusting thickness, in addition to Cr doping, can externally regulate soft magnetic and magnetocaloric properties to create diverse magnetic ground states for future MCE and inverse MCE functionalities.

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“…The ΔSM is a function of both H and T, but ΔSL and ΔSE are functions of T only hence ΔSM have dominant contributions when changing the strength of H. Normally, strong MCE occurs upon exposure of a magnetic material to external magnetic fields near its magnetic phase transitions (Curie temperature, TC) of the ferrimagnetic (FIM) material. However, IMCE effects have been observed near the antiferromagnetic (AFM) transition temperature (Neel temperature, TN) [5][6][7][8][9], as well as the spin glass (SG) transition temperature (TG) [1][2].…”

Section: Introductionmentioning

confidence: 99%

Determination of normal and inverse magnetocaloric effect in iron oxide thin films

Bohra,

Gupta,

Sahadot

et al. 2023

Appl. Phys. A

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Magnetic cooling requires energy-efficient and eco-friendly alternatives to conventional rare earth element-based materials, which rely on materials with customized magnetic and structural properties. This study introduces the growth of iron oxide thin films for designing magnetocaloric materials, using a phenomenological model to screen candidates for the magnetocaloric effect (MCE) and inverse magnetocaloric effect (IMCE). Based on the Curie temperature (TC) window concept, ferrimagneticFe3O4 and the antiferromagnetic α−Fe2O3 and FeO thin films are identified as potential candidates for structural transitions (TV) and spin rearrangement (TN) achieved by manipulating their nanoscale ordering temperatures. These oxide films exhibit IMCE with a maximum entropy change (ΔSmax) ranging from 0.13 to 1.87 J/kg-K at TV and/or TN, while demonstrating the MCE effect at low temperatures.Interestingly, we demonstrate that IMCE can occur in Fe3O4 thin films without a structural transition but with a change in anisotropy. Additionally, utilizing textured growth to tailor magneto-structural coupling in thin films is predicted as a novel approach for engineering magnetocaloric materials.

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Tuning of normal and inverse magnetocaloric effect in Sm0.35Pr0.15Sr0.5MnO3 phase separated manganites

Cited by 18 publications

References 43 publications

Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Coexistence of normal and inverse magnetocaloric effect in inhomogeneous Ni₉₅Cr₅ layers

Determination of normal and inverse magnetocaloric effect in iron oxide thin films

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Tuning of normal and inverse magnetocaloric effect in Sm0.35Pr0.15Sr0.5MnO3 phase separated manganites

Cited by 18 publications

References 43 publications

Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Magnetocaloric effect in (La1−Sm )0.67Pb0.33MnO3 (0 ≤ x ≤ 0.3) manganites near room temperature

Coexistence of normal and inverse magnetocaloric effect in inhomogeneous Ni95Cr5 layers

Determination of normal and inverse magnetocaloric effect in iron oxide thin films

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Coexistence of normal and inverse magnetocaloric effect in inhomogeneous Ni₉₅Cr₅ layers