Ca1-xNdxMnO3 (x = 0, 0,2 ve 0,4) Örneklerinin Yapısal ve Manyetik Özelliklerinin İncelenmesi

Abstract

Bu çalışma, farklı oranlarda Neodimyum (Nd) ile katkılanan CaMnO3 örneklerinin yapısal ve manyetik özelliklerini araştırmaktadır. Ca1-xNdxMnO3 (x = 0, 0,2 ve 0,4) örnekleri, katı hal reaksiyon yöntemi ile sentezlenmiştir ve X-ışını Difraksiyonu (XRD) kullanılarak yapısal analizleri gerçekleştirilmiştir. Nd katkısının artışıyla birlikte, CaMnO3 fazının yapısında değişiklikler gözlemlenmiştir. SEM sonuçları, Nd katkısının tanecik boyutu üzerinde belirgin bir etkisi olduğunu ve katkılamanın taneciklerin küçülmesine yol açtığını ortaya koymaktadır. Manyetik ölçümler, Fiziksel Özellikler Ölçüm Sistemi (PPMS) kullanılarak gerçekleştirilmiştir. Elde edilen sonuçlar, Nd katkısının, Mn⁺3-O-Mn+4 çift-değişim etkileşimlerinin ideal düzlemden sapmasına yol açarak, manyetik düzenin antiferromanyetik yapıdan kısmen ferromanyetik yapıya doğru kaymasına zemin hazırlamıştır.

Keywords

• CaMnO3
• yapısal özellikler
• manyetik özellikler

Investigation of the Structural and Magnetic Properties of Ca1-xNdxMnO3 (x = 0, 0.2, and 0.4) Samples

Abstract

This study investigates the structural and magnetic properties of CaMnO3 samples doped with different ratios of Neodymium (Nd). Ca1-xNdxMnO3 (x = 0, 0.2, and 0.4) samples were synthesized using the solid-state reaction method, and their structural analyses were performed using X-Ray Diffraction (XRD). With increasing Nd doping, changes were observed in the structure of the CaMnO3 phase. SEM results reveal that Nd doping has a noticeable effect on grain size, leading to a reduction in grain dimensions. Magnetic measurements were conducted using a Physical Property Measurement System (PPMS). The results indicate that Nd doping causes deviations in the Mn3+-O-Mn4+ double-exchange interactions from the ideal plane, facilitating a shift in the magnetic order from an antiferromagnetic structure to a partially ferromagnetic structure.

Keywords

• CaMnO3
• structural properties
• magnetic properties

References

1. Bharamagoudar, R., Angadi V, J., Pattar, V., Patil, A. S., Patil, S., Raghu S, Kulkarni,S., Malakannavar, M. V., Matteppanavar, S., (2022), Low temperature magnetic properties of Gd doped CaMnO3, Chemical Data Collections, 39, 100846.
2. Chandra, S., Biswas, A., Phan, M., Srikanth, H., (2015), Impacts of nanostructuring and magnetic ordering of Nd3+ on the magnetic and magnetocaloric response in NdMnO3, Journal of Magnetism and Magnetic Materials, 384, 138-143.
3. Dey, S., Sreenivasulu, A., Veerendra, G.T.N., Rao, K. V., Babu, P.S.S.A., (2022), Renewable energy present status and future potentials in India: An overview, Innovation and Green Development, 1, 100006.
4. El-Moez, A., Mohamed, A., Hernando, B., Ahmed, A. M., (2017), Magnetic, magnetocaloric and thermoelectric properties of nickel doped manganites, J. Alloy. Compd., 692, 381–387.
5. Gürsul, M., Çetin, G., Ergin, İ., Korkmaz, L., Özçelik, B., Torres, M.A., Madre, M. A., Sotelo, A., (2024) Remarkable variation in microstructural, thermoelectric, and magnetic properties of CaMnO3 through Ce doping, Materials Science and Engineering: B, 299, 116986.
6. Hervieu, M., Martin, C., Maignan, A. et al., (1999), Charge ordering-disordering in the Th-doped CaMnO3, Eur. Phys. J. B, 10, 397–408.
7. Hu, J., Wang, Y., Zhang, Y., Liu, H., Qin, H., Li, B., (2011), Sample thickness dependence of giant magnetoimpedance under low fields for La0.67Sr0.33Mn0.98Co0.02O3 manganites, J. Alloy. Compd., 509,1360–1363.
8. Lan, J., Lin, Y-H, Fang, H., Mei, A., Nan, C-W., Liu, Y., Xu, S., Peters, M., (2010) High-Temperature Thermoelectric Behaviors of Fine-Grained Gd-Doped CaMnO3 Ceramics, J. Am. Ceram. Soc., 93(8), 2121–2124.

9. Loshkareva, N. N., Mushnikov, N. V., Korolyov, A. V., Neifeld, E. A., Balbashov, A. M., (2008), Charge ordering melting in CaMnO3 δ single crystals with ordered oxygen vacancies, Phys. Rev. B ,77,052406.
10. Loshkareva, N.N., Mostovshchikova, E.V., (2012), Electron-doped manganites based on CaMnO3, Phys. Metals Metallogr., 113, 19–38.
11. Nadig, P. R., Murari M. S., Daivajna M. D., (2024), Influence of heat sintering on the physical properties of bulk La0.67Ca0.33MnO3 perovskite manganite: role of oxygen in tuning the magnetocaloric response, Physical Chemistry Chemical Physics, 26, 5237-5252.
12. Neetika, Das, A., Dhiman, I., Nigam, A. K., Yadav, A. K., Bhattacharyya, D., Meena, S. S., (2012) Transport and magnetic properties of Fe doped CaMnO3, J. Appl. Phys., 112, 123913.
13. Phan, M. H. and Yu, S. C., (2007). Review of the magnetocaloric effect in manganite materials, Journal of Magnetism and Magnetic Materials, 308(2), 325–340.
14. Sharma, N., Das, A., Prajapat, C. L., Kumar, A., Singh, M. R., (2016), Phase separated behavior in yttrium doped CaMnO3, Materials Research Bulletin, 77, 284-290.
15. Sun, J. R., Shen, B. G., Sheng; Z. G., Sun Y. P., (2004), Temperature-dependent photovoltaic effects in the manganite-based heterojunction, Appl. Phys. Lett., 85, 3375–3377.
16. Vijay, A., Suhashini, R., Jose, R., Prasanth, S. C., Saravanan, K. V., (2020), Thermoelectric behavior of Samarium doped CaMnO3 perovskite, AIP Conf. Proc., 2220 (1): 080029.
17. Wang, H., Su, W., Liu, J., Wang, C., (2016), Recent development of n-type perovskite thermoelectrics, Journal of Materiomics, 2(3), 225-236.
18. Xu, G., Funahashi, R., Pu Q., Liu, B., Tao, R., Wang, G., Ding, Z., (2004), High-temperature transport properties of Nb and Ta substituted CaMnO3 system, Solid State Ionics, 171(1–2), 147-151.
19. Yamashita, T., (2007), Physical properties of Na doped CaMnO3, Materials Chemistry and Physics, 103(2-3), 461-464.
20. Zeng Z. Greenblatt M., Croft M., (1999), Large magnetoresistance in antiferromagnetic CaMnO3, Physical Review B, 59, 8784.
21. Zeng, Z., Greenblatt, Z. M., Croft. M., (2001), Charge ordering and magnetoresistance of Ca1− x Cex MnO3, Physical Review B, 63, 224410.
22. Zhou, Y., Zheng, S., Zhang, G., (2019). Study on the energy performance enhancement of a new PCMs integrated hybrid system with the active cooling and hybrid ventilations, Energy, 179, 111-128.
23. Zhou, W., Lou, C., Li, Z., Lu, L., Yang, H., (2010). Current status of research on optimum sizing of stand-alone hybrid solar–wind power generation systems, Applied Energy, 87(2), 380-389.