Room temperature magnetic and magnetocaloric properties of La0.67Ba0.33Mn0.98Ti0.02O3 perovskite

Oumezzine, M.; Zemni, S.; Peña, O.

doi:10.1016/j.jallcom.2010.08.145

Cited by 53 publications

(15 citation statements)

References 24 publications

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“…(6) and experimental M-H curves at various temperatures, the magnetic-entropy change vs. temperature | S M | can be calculated. These values are clearly comparable to the pure Gd [22] (| S M | ∼ 3.25 J/kg K at H = 10 KOe) and other selected manganites [23][24][25][26][27][28][29][30][31] (Table 1).…”

Section: Magnetocaloric Effectsupporting

confidence: 75%

Magnetic and Magnetocaloric Properties of La0.67Pb0.33−x Ag x MnO3 Compounds

Mtiraoui

Dhahri

Oumezine

et al. 2012

J Supercond Nov Magn

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In this paper, we have studied the magnetic and magnetocaloric properties of the perovskite manganites La 0.67 Pb 0.33−x Ag x MnO 3 (0 ≤ x ≤ 0.15), which show a sharp paramagnetic-ferromagnetic phase transition over a wide temperature range (T = 250-401 K). The Curie temperature has been analyzed by two methods: using the numerical derivative dM/dT and the thermodynamic model. The experimental results indicate that T C decreases from 368 to 288 K with increasing Ag substitution independently of the method used to obtain T C . Upon 10 KOe applied magnetic field, the large magnetic-entropy change (| S M |) reaches values of 2.75, 3, 3.25 and 3.5 J/kg K for x = 0, 0.05, 0.10 and 0.15 compositions, respectively, which are comparable to that of Gd. The relative cooling power (RCP) increases with increasing Ag content from 68.75 (x = 0) to 156.27 J/kg (x = 0.15) for H = 10 KOe. Through these results, La 0.67 Pb 0.33−x Ag x MnO 3 materials are strongly suggested for the use of active refrigerants for magnetic refrigeration technology near room temperature.N. Mtiraoui ( ) · M. Oumezine

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Section: Magnetocaloric Effectsupporting

confidence: 75%

Magnetic and Magnetocaloric Properties of La0.67Pb0.33−x Ag x MnO3 Compounds

Mtiraoui

Dhahri

Oumezine

et al. 2012

J Supercond Nov Magn

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“…To get further insight into the magnetic properties of these materials, we calculated -S M (T) theoretically on the basis of Landau theory of phase transitions [40][41][42]. According to Landau theory, the Gibbs free energy can be expressed as,…”

Section: Recently Franco Et Al Have Demonstrated That the Magnetic Ementioning

confidence: 99%

Impacts of nanostructuring and magnetic ordering of Nd3+ on the magnetic and magnetocaloric response in NdMnO3

Chandra

Biswas

Phan

et al. 2015

Journal of Magnetism and Magnetic Materials

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Magnetocaloric properties of NdMnO 3 were investigated in its bulk polycrystalline and nanocrystalline forms. The nanocrystalline sample (average particle size 40 nm) exhibits a maximum in the temperature dependence of magnetic entropy change [-S M (T)] at 70 K due to the paramagnetic to ferromagnetic transition, which is absent in case of its bulk counterpart. The absence of peak in-S M (T) in the bulk sample is attributed to the coexistence of antiferromagnetic and ferromagnetic phases. A canted magnetic state (CMS) is stabilized at low temperature for both the samples due to the ordering of Nd 3+ giving rise to a peak in-S M (T) at 15 K. Interestingly-S M (T) for these two samples show a universal behavior near their transitions at low temperature although their temperature dependence of magnetization is markedly different around those transitions. A detailed analysis of magnetocaloric data conclusively establishes the existence of a canted magnetic state, which is not obvious from magnetometry, demonstrating the usefulness of this method for probing phase coexistence and multiple magnetic states in complex oxide systems.

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“…The dataset consisted of 35 compounds of La x M 1‐ x ‐ z R z Mn y N 1‐ y O 3 perovskites with known T c between 160 and 369 K, which was collected from 20 references . The candidate descriptors were proposed based on the domain knowledge of perovskite compounds.…”

Section: Case Studiesmentioning

confidence: 99%

Material data mining in Nianyi Chen's scientific family

Zhang

et al. 2018

Journal of Chemometrics

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The origin of the material data mining (MDM) field in China can be traced back to Professor Nianyi Chen's pioneering contributions in the 80s of the 20th century. His scientific protégés have inherited his research legacy and been continuously pursuing research in this field. The present article provides an overview on the MDM research conducted by Nianyi Chen's scientific family, by reviewing these achievements of the formation criteria of amorphous phases in ternary fluorides, the discovery of new compounds in molten salt systems, the design of layered double hydroxide with desired specific surface area, and the discovery of perovskite material with desired Curie temperature. These achievements indicate that the MDM is a powerful approach in material discovery and innovation and will play a more important role in the development of

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Room temperature magnetic and magnetocaloric properties of La0.67Ba0.33Mn0.98Ti0.02O3 perovskite

Cited by 53 publications

References 24 publications

Magnetic and Magnetocaloric Properties of La0.67Pb0.33−x Ag x MnO3 Compounds

Magnetic and Magnetocaloric Properties of La0.67Pb0.33−x Ag x MnO3 Compounds

Impacts of nanostructuring and magnetic ordering of Nd3+ on the magnetic and magnetocaloric response in NdMnO3

Material data mining in Nianyi Chen's scientific family

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