Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure
Abstract
Pressure effects on magnetic properties of two La0.7Ca0.3MnO3 nanoparticle samples with different mean particle sizes were investigated. Both the samples were prepared by the glycine-nitrate method: sample S-as-prepared (10 nm), and sample S-900-subsequently annealed at 900 A degrees C for 2 h (50 nm). Magnetization measurements revealed remarkable differences in magnetic properties with the applied pressure up to 0.75 GPa: (i) for S sample, both transition temperatures, para-to-ferromagnetic T (C) = 120 K and spin-glass-like transition T (f) = 102 K, decrease with the pressure with the respective pressure coefficients dT (C)/dP = -2.9 K/GPa and dT (f)/dP = -4.4 K/GPa; (ii) for S-900 sample, para-to-ferromagnetic transition temperature T (C) = 261 K increases with pressure with the pressure coefficient dT (C)/dP = 14.8 K/GPa. At the same time, saturation magnetization M (S) recorded at 10 K decreases/increases with pressure for S/S-900 sample, respectively. Explanation of these unusual... pressure effects on the magnetism of sample S is proposed within the scenario of the combined contributions of two types of disorders present in the system: surface disorder introduced by the particle shell, and structural disorder of the particle core caused by the prominent Jahn-Teller distortion. Both disorders tend to vanish with the annealing of the system (i.e., with the nanoparticle growth), and so the behavior of the sample S-900 is similar to that previously observed for the bulk counterpart.
Keywords:
Manganites / Nanoparticles / Disorder / Pressure effect / Magnetic propertiesSource:
Journal of Nanoparticle Research, 2010, 12, 4, 1299-1306Funding / projects:
- Serbian-Slovak bilateral project [SK-SRB-00207], Serbian-Slovak national projects [P-141027, VEGA 2/0057/10]
DOI: 10.1007/s11051-010-9852-2
ISSN: 1388-0764
WoS: 000276883600022
Scopus: 2-s2.0-77955089291
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VinčaTY - JOUR AU - Kusigerski, Vladan AU - Marković, D. AU - Spasojević, Vojislav AU - Tadić, Marin AU - Zentkova, M. AU - Mihalik, M. PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/3983 AB - Pressure effects on magnetic properties of two La0.7Ca0.3MnO3 nanoparticle samples with different mean particle sizes were investigated. Both the samples were prepared by the glycine-nitrate method: sample S-as-prepared (10 nm), and sample S-900-subsequently annealed at 900 A degrees C for 2 h (50 nm). Magnetization measurements revealed remarkable differences in magnetic properties with the applied pressure up to 0.75 GPa: (i) for S sample, both transition temperatures, para-to-ferromagnetic T (C) = 120 K and spin-glass-like transition T (f) = 102 K, decrease with the pressure with the respective pressure coefficients dT (C)/dP = -2.9 K/GPa and dT (f)/dP = -4.4 K/GPa; (ii) for S-900 sample, para-to-ferromagnetic transition temperature T (C) = 261 K increases with pressure with the pressure coefficient dT (C)/dP = 14.8 K/GPa. At the same time, saturation magnetization M (S) recorded at 10 K decreases/increases with pressure for S/S-900 sample, respectively. Explanation of these unusual pressure effects on the magnetism of sample S is proposed within the scenario of the combined contributions of two types of disorders present in the system: surface disorder introduced by the particle shell, and structural disorder of the particle core caused by the prominent Jahn-Teller distortion. Both disorders tend to vanish with the annealing of the system (i.e., with the nanoparticle growth), and so the behavior of the sample S-900 is similar to that previously observed for the bulk counterpart. T2 - Journal of Nanoparticle Research T1 - Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure VL - 12 IS - 4 SP - 1299 EP - 1306 DO - 10.1007/s11051-010-9852-2 ER -
@article{ author = "Kusigerski, Vladan and Marković, D. and Spasojević, Vojislav and Tadić, Marin and Zentkova, M. and Mihalik, M.", year = "2010", abstract = "Pressure effects on magnetic properties of two La0.7Ca0.3MnO3 nanoparticle samples with different mean particle sizes were investigated. Both the samples were prepared by the glycine-nitrate method: sample S-as-prepared (10 nm), and sample S-900-subsequently annealed at 900 A degrees C for 2 h (50 nm). Magnetization measurements revealed remarkable differences in magnetic properties with the applied pressure up to 0.75 GPa: (i) for S sample, both transition temperatures, para-to-ferromagnetic T (C) = 120 K and spin-glass-like transition T (f) = 102 K, decrease with the pressure with the respective pressure coefficients dT (C)/dP = -2.9 K/GPa and dT (f)/dP = -4.4 K/GPa; (ii) for S-900 sample, para-to-ferromagnetic transition temperature T (C) = 261 K increases with pressure with the pressure coefficient dT (C)/dP = 14.8 K/GPa. At the same time, saturation magnetization M (S) recorded at 10 K decreases/increases with pressure for S/S-900 sample, respectively. Explanation of these unusual pressure effects on the magnetism of sample S is proposed within the scenario of the combined contributions of two types of disorders present in the system: surface disorder introduced by the particle shell, and structural disorder of the particle core caused by the prominent Jahn-Teller distortion. Both disorders tend to vanish with the annealing of the system (i.e., with the nanoparticle growth), and so the behavior of the sample S-900 is similar to that previously observed for the bulk counterpart.", journal = "Journal of Nanoparticle Research", title = "Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure", volume = "12", number = "4", pages = "1299-1306", doi = "10.1007/s11051-010-9852-2" }
Kusigerski, V., Marković, D., Spasojević, V., Tadić, M., Zentkova, M.,& Mihalik, M.. (2010). Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure. in Journal of Nanoparticle Research, 12(4), 1299-1306. https://doi.org/10.1007/s11051-010-9852-2
Kusigerski V, Marković D, Spasojević V, Tadić M, Zentkova M, Mihalik M. Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure. in Journal of Nanoparticle Research. 2010;12(4):1299-1306. doi:10.1007/s11051-010-9852-2 .
Kusigerski, Vladan, Marković, D., Spasojević, Vojislav, Tadić, Marin, Zentkova, M., Mihalik, M., "Magnetic properties of nanoparticle La0.7Ca0.3MnO3 under applied hydrostatic pressure" in Journal of Nanoparticle Research, 12, no. 4 (2010):1299-1306, https://doi.org/10.1007/s11051-010-9852-2 . .