Effects of A-site cationic radius and cationic disorder on the electromagnetic properties of La0.7Ca0.3MnO3 ceramic with added Sr, Pb, and Ba

Li, Yule; Zhang, Hui; Chen, Qingming; Li, Di; Li, Zhiyu; Zhang, Yalin

doi:10.1016/j.ceramint.2017.12.165

Cited by 32 publications

(7 citation statements)

References 24 publications

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“…It was observed that ρ 0 decreases under an applied magnetic field and this can be attributed to the increase in domain, size thus reducing the value of ρ 0 [20]. On the other hand, the electron-magnon scattering (ρ 4.5 ) interaction was small in our study as it originated from the induced spin inhomogeneity [51]. As shown by the tolerance factor, LSMO and NSMO compounds are stable perovskite structures and exhibit less electron spin fluctuation.…”

Section: Resultsmentioning

confidence: 53%

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The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

et al. 2021

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La0.7Sr0.3MnO3 (LSMO) and Nd0.7Sr0.3MnO3 (NSMO) possess excellent colossal magnetoresistance (CMR). However, research work on the neodymium-based system is limited to date. A comparative study between LSMO and NSMO prepared by sol–gel and solid-state reaction methods was undertaken to assess their structural, microstructural, magnetic, electrical, and magneto-transport properties. X-ray diffraction and structure refinement showed the formation of a single-phase composition. Sol–gel-synthesised NSMO was revealed to be a sample with single crystallite grains and exhibited intriguing magnetic and electrical transport behaviours. Magnetic characterisation highlighted that Curie temperature (TC) decreases with the grain size. Strong suppression of the metal–insulator transition temperature (TMI) was observed and attributed to the magnetically disordered grain surface and distortion of the MnO6 octahedra. The electrical resistivity in the metallic region was fitted with theoretical models, and the conduction mechanism could be explained by the grain/domain boundary, electron–electron, and electron–magnon scattering process. The increase in the scattering process was ascribed to the morphology changes. Enhancement of low-field magnetoresistance (LFMR) was observed in nano-grained samples. The obtained results show that the grain size and its distribution, as well as the crystallite formation, strongly affect the physical properties of hole-doped manganites.

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Section: Resultsmentioning

confidence: 53%

“…To understand the nature of different scattering mechanisms responsible for the conduction in the metallic region (T < T MI ), the electrical resistivity results were fitted with the equation below [42,[51][52][53]:…”

Section: Resultsmentioning

confidence: 99%

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

et al. 2021

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“…In summary, optimal TCR can be found in the LCMO with Tcal of 500 °C. at Tcal = 800 °C, which is higher than the MR of LCMO ceramics prepared by the solgel method [29,30].…”

Section: Electrical Transport Propertiesmentioning

confidence: 71%

Effect of The Calcination Process On The Magnetotransport Properties in Co-Precipitation Derived La0.67Ca0.33MnO3 Ceramics

Xiao-jin

et al. 2021

Preprint

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La0.67Ca0.33MnO3 (LCMO) attracts considerable attention as a quintessential example for colossal magnetoresistance (CMR), metal-insulator transition and related temperature coefficient of resistance (TCR) studies. Here, co-precipitation method was utilized to prepare the LCMO ceramics, whose magnetotransport properties as a function of calcination temperature (Tcal) and calcination time (tcal) were investigated. The magnetotransport properties of these LCMO ceramics were significantly enhanced compared with LCMO derived by sol-gel methods. The TCR of LCMO increased firstly and then decreased as the Tcal increased, whereas the metal-insulator transition temperature (TMIT) shifted towards to the lower temperature. Magnetoresistance (MR) increased as Tcal rose and reached 82.4 % at Tcal = 800 ℃. The mechanism of such magnetotransport properties with different temperature ranges was discussed. The optimal TCR of 32.3%·K-1 in LCMO was prepared with Tcal = 500 ℃ and tcal = 8 h, showing that co-precipitation method would facilitate the potential application of LCMO in infrared detecting and magnetoresistive switching.

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“…Other parameters related to magnetic properties such as T C , −Δ S M , and magnetic phase transition are the mismatch effect ( σ 2 ). 1 In perovskite manganite (PM) materials, a large value of σ 2 is defined as the difference in the ion radius values for each ion at site-A compared to 〈 r A 〉, and it can be formulated as follows: 8,162–164 σ 2 = Σ x i r i 2 − 〈 r A 〉 2 where, 〈 r A 〉 is the average ion radii size, x i is the ion content in the system, and r i is the ion radii size in the system. For example, Razaq et al calculated the σ 2 values for La 0.8 K x Ba 0.05 Sr 0.15− x MnO 3 ( x = 0.00–0.20) with results from 3.833 × 10 −3 to 18.101 × 10 −3 .…”

Section: Phenomena and Parameters Influencing The Behavior Of Mce In ...mentioning

confidence: 99%

The magnetocaloric effect properties for potential applications of magnetic refrigerator technology: a review

Nehan,

Vitayaya,

Munazat

et al. 2024

Phys. Chem. Chem. Phys.

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Effects of A-site cationic radius and cationic disorder on the electromagnetic properties of La0.7Ca0.3MnO3 ceramic with added Sr, Pb, and Ba

Cited by 32 publications

References 24 publications

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

The Physical Properties of Submicron and Nano-Grained La0.7Sr0.3MnO3 and Nd0.7Sr0.3MnO3 Synthesised by Sol–Gel and Solid-State Reaction Methods

Effect of The Calcination Process On The Magnetotransport Properties in Co-Precipitation Derived La0.67Ca0.33MnO3 Ceramics

The magnetocaloric effect properties for potential applications of magnetic refrigerator technology: a review

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