Abstract
La0.67−xDyxSr0.33MnO3 (x = 0.1, 0.12, 0.15, 0.20, 0.25, 0.30, 0.32) ceramics were prepared by sol–gel method. The samples were characterized by scanning electron microscopy, X-ray diffractometry, and resistance–temperature test (ρ–T) method. The experimental results showed that all of the samples were composed of a single phase with the orthorhombic perovskite structure and Pnma space group. The samples had high density, the average size of the grain decreased from 11.83 μm to 7.24 μm, while the number of grain boundaries increased. The one reason why resistance (ρmax) increases was supposed to be the boundary scattering enhancement, while the temperature corresponding to the peak resistivity (TP) decreases. The average cation radius of the A-site decreased as the amount/concentration of doping with Dy3+ increased, changing the bond length and bond angle. Meanwhile, the double exchange was suppressed, this being another and more important reason why the resistance increased and the TP decreased. The metal–insulator transition temperature wide degree (ΔT) and resistivity (ρ) are the important factors in the temperature coefficient of resistance. In the competition of the two factors, the ρ occupied an advantageous place, therefore the electrical properties of the materials can be further optimized by adjusting the average cation radius of the A-site.
Similar content being viewed by others
References
S. Jin, T.H. Tiefel, M. McCormack, R.A. Fastnacht, R. Ramesh, L.H. Chen, Science 264, 413–415 (1994)
C.N. Rao, Gaint magnetoresistance and related properties of rare-earth manganates and other oxide systems. Chem. Mater. 8, 2421–2434 (1996)
A.P. Ramirez, Colossal magnetoresistance. J. Phys. 9, 8171–8199 (1997)
P.G. De Gennes, Effect of double exchange in magnetic crystals. PhysRev 118(1), 141–154 (1960)
D.G. Kuberkar, R.R. Doshi, P.S. Solanki et al., Grain morphology and size disorder effect on the transport and magnetotransport in sol-gel grown nanostructured manganites. Appl. Surf. Sci. 258(22), 9041–9046 (2012)
R. Von Helmholt et al., Giant negative magnetoresistance in perovskitelike La2/3Ba1/3MnOx ferromagnetic films. Phys. Rev. Lett. 71, 2331 (1993)
A.J. Millis, P.B. Littlewood, B.I. Shraiman, Double exchange alone does not explain the resistivity of La1–xSrxMnO3. Phys. Rev. Lett. 74, 5144–5147 (1999)
A.J. Millis, B.I. Shraiman, R. Mueller, Dynamic Jahn−Teller effect and colossal magnetoresistance in La1–xSrxMnO3. Phys. Rev. Lett. 77(1), 175–178 (1996)
D.G. Kuberkar, R.R. Doshi, P.S. Solanki et al., Grain morphology and size disorder effect on the ttransport and magnetotransport in sol-gel grown nanostructured manganites. Appl. Surf. Sci. 258(22), 9041–9046 (2012)
A.J. Millis, Cooperative Jahn-Teller effect and electron-phonon coupling in La1-xAxMnO3. Phys. Rev. B 53(13), 8434–8441 (1996)
H.Y. Hwang, S.W. Choeng, P.G. Radaelli et al., Lattice effect on magnetoresistance in doped LaMnO3. Phys. Rev. Lett. 75(5), 914 (1995)
S. Bhattacharya, R.K. Mukherjee, B.K. Chaudhuri, H.D. Yang, Appl. Phys. Lett. 82, 4101 (2003)
K.R. Mavani, P.L. Paulose, Effects of cation size disorder and lattice distortion on metamagnetism in phase-separated manganites. Solid State Commun. 135(3), 183–188 (2005)
T. Govardhan Reddy, P. Yadagiri Reddy, V. Raghavendra Reddy et al., Solid State Commun. 133, 77–81 (2005)
D. Li, Q. Chen, Z. Li, H. Zhang, Y. Zhang, Structure, electrical and magnetic properties of La0.67Ca0.33−xKxMnO3 polycrystalline ceramic. J. Mater. Sci. 29, 1808–1816 (2017)
J. Ma, Y. Cai, W. Wang, Q. Cui, M. Theingi, H. Zhang, Q. Chen, Enhancement of temperature coefficient of resistivity in La0.67Ca0.33MnO3 polycrystalline ceramics. Ceram. Int. 40, 4963–4968 (2014)
F. Jin, H. Zhang, X. Chen, X. Liu, Q. Chen, Improvement in electronic and magnetic transport of La0.67Ca0.33MnO3 manganites by optimizing sintering temperature. J. Sol-gel. Sci. Technol. 81, 1–8 (2016)
T. Sun, S. Zhao, F. Ji, X. Liu, Enhanced room-temperature MR and TCR in polycrystalline La0.67(Ca0.33−xSrx)MnO3 ceramics by oxygen assisted sintering. Ceram. Int. 44, 2400–2406 (2018)
L. Li, H. Zhang, X. Liu, Structure and electromagnetic properties of La0.7Ca0.3-xKxMnO3 polycrystalline ceramics. Ceram. Int. 45, 10558–10564 (2019)
T. Han, Y. Chen, G. Tian et al., Hydrogenated TiO2/SrTiO3 porous microspheres with tunable band structure for solar-light photocatalytic H2 and O2 evolution. Sci. China Mater. 59, 1003–1016 (2016)
A. Sobhani-Nasab, S. Mostafa Hosseinpour-Mashkani, M. Salavati-Niasari, H. Taqriri, S. Bagheri, K. Saberyan, J. Mater. Sci.: Mater. Electron. 26, 5735–5742 (2015)
A. Sobhani-Nasab, Z. Zahraei, A. Mahnaz, Synthesis, characterization, and antibacterial activities of ZnLaFe2O4/NiTiO3 nanocomposite. J. Mol. Struct. 1139, 430–435 (2017)
A. Sobhani-Nasab, S.M. Hosseinpour-Mashkani, M. Salavati-Niasari et al., J. Clust. Sci. 26, 1305 (2015)
L.W. Lei, Z.Y. Fu, J.Y. Zhang, H. Wang, Synthesis and low field transport properties in a ZnO-doped La0.67Ca0.33MnO3 composite. Mater. Sci. Eng. B 128, 70–74 (2006)
S. Yang, X. Liu, J. Dai, H. Zhang, Q. Chen, La0·7Ca0.3-xSrxMnO3:Ag0.2 (0.0165 ≤ x ≤ 0.1) ceramics with large and stable TCR in different magnetic field environments. Ceram. Int. 45, 24742–24749 (2018)
L.M. Wang, C.-Y. Wang, C.C. Tseng, Correlation of the temperature coefficient of resistivity for doped manganites to the transition temperature, polaron binding energy, and magnetic order. Appl. Phys. Lett. 100(23), 232403 (2012)
X. Chen, Q. Chen, F. Jin, X. Liu, H. Zhang, Effect of Ca-doping on the electrical properties of La0.2Nd0.47Sr0.33MnO3 ceramics prepared by sol-gel technique. J. Sol-Gel Sci. Technol. 80(1), 177–183 (2017)
Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 11564021).
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Ling, F., Li, D., Li, L. et al. Effect of A-site cationic radius on ceramic La0.67−xDyxSr0.33MnO3 prepared by sol–gel technique. J Mater Sci: Mater Electron 31, 7623–7629 (2020). https://doi.org/10.1007/s10854-020-03275-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10854-020-03275-0