Large magnetocaloric effect in lanthanum-deficiency manganites La0.8−x□xCa0.2MnO3 (0.00≤x≤0.20) with a first-order magnetic phase transition

Skini, R.; Omri, Ahmed; Khlifi, M.; Dhahri, E.; Hlil, E.K.

doi:10.1016/j.jmmm.2014.04.009

Cited by 67 publications

(20 citation statements)

References 25 publications

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“…However, Zhang et al [21] observed that Tc decreased with increase in the grain size in the range of 24.4-240 nm. It is known that this variation of Tc is controlled by the electron bandwidth W and the mobility of eg electrons [11,22,23]. In fact, the structure, magnetism, and the magnetocaloric effect are very correlated, primarily by the bandwidth W.…”

Section: Resultsmentioning

confidence: 99%

“…The La 0.8−x x Ca 0.2 MnO 3 (x = 0, 0.1 and 0.2) compounds were prepared by solid-state reaction and heated at a temperature of 1373 K. The preparation method as well as the structural and magnetic results were discussed in our previous research work [11]. In the present work, these samples were annealed at 973 K for 7 days in air.…”

Section: Methodsmentioning

confidence: 97%

“…. ), have roused plenty of research thanks to their important electrical and magnetic properties, such as the colossal magnetoresistance (CMR) [2][3][4][5][6][7][8] and the magnetocaloric effect (MCE) [9][10][11][12][13][14]. That is why the parameter necessary for selecting magnetic refrigerants is based on the cooling power per unit volume and the relative cooling power (RCP).…”

Section: Introductionmentioning

confidence: 99%

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Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

2017

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Abstract:The lanthanum deficiency manganites La 0.8−x x Ca 0.2 MnO 3 (x = 0, 0.1 and 0.2), where is a lanthanum vacancy, were prepared using the classic ceramic methods with different thermal treatments (1373 K and 973 K). The structural, magnetic, and magnetocaloric properties of these compounds were studied as a function of annealing temperature. It was noted that the annealing temperature did not affect the crystal structure of our samples (orthorhombic structure with Pnma space group). Nevertheless, a change in the variation of the unit cell volume V, the average bond length d Mn-O , and the average bond angles θ Mn-O-Mn were observed. Magnetization versus temperature study has shown that all samples exhibited a magnetic transition from ferromagnetic (FM) to paramagnetic (PM) phase with increasing temperature. However, it can be clearly seen that the annealing at 973 K induced an increase of the magnetization. In addition, the magnetocaloric effect (MCE) as well as the relative cooling power (RCP) were estimated. As an important result, the values of MCE and RCP in our Lanthanum-deficiency manganites are reported to be near to those found in gadolinium, considered as magnetocaloric reference material.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

2017

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“…transition temperature as a function of the Mn +4 fraction in La-manganites (data taken from supplemental material of [29] and [31][32][33][34][35][36][37]). [29] and [31][32][33][34][35][36][37]).…”

Section: Figurementioning

confidence: 99%

Distribution of Transition Temperatures in Magnetic Transformations: Sources, Effects and Procedures to Extract Information from Experimental Data

Manchón-Gordón

López-Martín

Vidal-Crespo

et al. 2020

Metals

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The presence of a distribution of transition temperatures (DTT) is ubiquitous in materials science. It is common to ascribe deviations from theoretical pure-phase behavior to this fact. To adapt the different pure phase models to systems with a DTT, the parameters of such distribution must be known or at least estimated. In this review, the different sources for the existence of such distributions and their effects on magnetothermal properties are summarized. In addition, different models proposed to extract the parameters of the corresponding DTT are discussed and extended, starting from Weiss model, to account for other phenomenologies. Experimental results on amorphous Fe-Nb-B and intermetallic MnCo(Fe)Ge systems are also reported.

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“…This makes them good candidates for a wide variety of applications. [4][5][6][7][8] As regards the La 1Àx Ca x MnO 3 compounds, they have a disadvantage that their Curie temperatures, T C , are well below room temperature. On the other side, doping Ca sites with large ions, for example Pb, Ba and Sr, has been explored by several researchers.…”

Section: Introductionmentioning

confidence: 99%

Correlation between magnetic and electric properties based on the critical behavior of resistivity and percolation model of La_0.8Ba_0.1Ca_0.1MnO₃ polycrystalline

Gdaiem

Dhahri

et al. 2017

RSC Adv.

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Large magnetocaloric effect in lanthanum-deficiency manganites La0.8−x□xCa0.2MnO3 (0.00≤x≤0.20) with a first-order magnetic phase transition

Cited by 67 publications

References 25 publications

Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

Distribution of Transition Temperatures in Magnetic Transformations: Sources, Effects and Procedures to Extract Information from Experimental Data

Correlation between magnetic and electric properties based on the critical behavior of resistivity and percolation model of La_0.8Ba_0.1Ca_0.1MnO₃ polycrystalline

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Large magnetocaloric effect in lanthanum-deficiency manganites La0.8−x□xCa0.2MnO3 (0.00≤x≤0.20) with a first-order magnetic phase transition

Cited by 67 publications

References 25 publications

Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

Impact of Annealing Temperature on the Physical Properties of the Lanthanum Deficiency Manganites

Distribution of Transition Temperatures in Magnetic Transformations: Sources, Effects and Procedures to Extract Information from Experimental Data

Correlation between magnetic and electric properties based on the critical behavior of resistivity and percolation model of La0.8Ba0.1Ca0.1MnO3 polycrystalline

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Correlation between magnetic and electric properties based on the critical behavior of resistivity and percolation model of La_0.8Ba_0.1Ca_0.1MnO₃ polycrystalline