Structure and microstructure of SmxY2-xO3
Apstrakt
SmxY2-xO3 solid solutions are semimagnetic semiconducting materials with wide energy gaps. Magnetic properties of these materials are coupled with their structural and microstructural parameters. Evidently, it is of interest to investigate these parameters in order to explain magnetic properties of diluted magnets. All mixed sesquioxides SmxY2-xO3 (x = 0.2, 0.5, 0.7, 1.0, 1.4 and 1.7) crystallize in C-M2O3 crystal type in space group Ia3 with Y3+ and Sm3+ cations in 24(d) and 8(b) Wyckoff positions, respectively. The X-ray diffraction data were used to establish the distribution of magnetic ions over crystallographic positions 8(b) and 24(d). A random distribution was found. The same data were used for evaluation of the crystal size, microstrain and paracrystallinity. The concentration dependence of these values was concluded. Results show that unit cell parameters obey Vegards rule, That fact leads to indirect information about well mixing of Y2O3 and Sm2O3. Agreement of the unit cell... parameters with Vegards rule is connected with the difference between cationic radii and electronegativity, The Sm3+-O2--Sm3+ bond geometry, important for the superexchange interaction, strongly depends on Sm3+ concentration. By comparing difference of unit cell parameters of the constitutive components Y2O3 and Sm2O3 and values of microstrains of their solid solutions it can be concluded that clusters are randomly formed.
Ključne reči:
structure / microstructure / solid solutions / diluted magneticsIzvor:
Solid State Ionics, 1997, 101, 495-501Napomena:
- XIIIth International Symposium on the Reactivity of Solids, Sep 08-12, 1996, Hamburg, Germany
DOI: 10.1016/S0167-2738(97)00150-1
ISSN: 0167-2738
WoS: 000071028700075
Scopus: 2-s2.0-0031273836
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Mitrić, Miodrag AU - Kremenović, Aleksandar S. AU - Dimitrijevic, R AU - Rodić, Dubravko PY - 1997 UR - https://vinar.vin.bg.ac.rs/handle/123456789/6227 AB - SmxY2-xO3 solid solutions are semimagnetic semiconducting materials with wide energy gaps. Magnetic properties of these materials are coupled with their structural and microstructural parameters. Evidently, it is of interest to investigate these parameters in order to explain magnetic properties of diluted magnets. All mixed sesquioxides SmxY2-xO3 (x = 0.2, 0.5, 0.7, 1.0, 1.4 and 1.7) crystallize in C-M2O3 crystal type in space group Ia3 with Y3+ and Sm3+ cations in 24(d) and 8(b) Wyckoff positions, respectively. The X-ray diffraction data were used to establish the distribution of magnetic ions over crystallographic positions 8(b) and 24(d). A random distribution was found. The same data were used for evaluation of the crystal size, microstrain and paracrystallinity. The concentration dependence of these values was concluded. Results show that unit cell parameters obey Vegards rule, That fact leads to indirect information about well mixing of Y2O3 and Sm2O3. Agreement of the unit cell parameters with Vegards rule is connected with the difference between cationic radii and electronegativity, The Sm3+-O2--Sm3+ bond geometry, important for the superexchange interaction, strongly depends on Sm3+ concentration. By comparing difference of unit cell parameters of the constitutive components Y2O3 and Sm2O3 and values of microstrains of their solid solutions it can be concluded that clusters are randomly formed. T2 - Solid State Ionics T1 - Structure and microstructure of SmxY2-xO3 VL - 101 SP - 495 EP - 501 DO - 10.1016/S0167-2738(97)00150-1 ER -
@article{ author = "Mitrić, Miodrag and Kremenović, Aleksandar S. and Dimitrijevic, R and Rodić, Dubravko", year = "1997", abstract = "SmxY2-xO3 solid solutions are semimagnetic semiconducting materials with wide energy gaps. Magnetic properties of these materials are coupled with their structural and microstructural parameters. Evidently, it is of interest to investigate these parameters in order to explain magnetic properties of diluted magnets. All mixed sesquioxides SmxY2-xO3 (x = 0.2, 0.5, 0.7, 1.0, 1.4 and 1.7) crystallize in C-M2O3 crystal type in space group Ia3 with Y3+ and Sm3+ cations in 24(d) and 8(b) Wyckoff positions, respectively. The X-ray diffraction data were used to establish the distribution of magnetic ions over crystallographic positions 8(b) and 24(d). A random distribution was found. The same data were used for evaluation of the crystal size, microstrain and paracrystallinity. The concentration dependence of these values was concluded. Results show that unit cell parameters obey Vegards rule, That fact leads to indirect information about well mixing of Y2O3 and Sm2O3. Agreement of the unit cell parameters with Vegards rule is connected with the difference between cationic radii and electronegativity, The Sm3+-O2--Sm3+ bond geometry, important for the superexchange interaction, strongly depends on Sm3+ concentration. By comparing difference of unit cell parameters of the constitutive components Y2O3 and Sm2O3 and values of microstrains of their solid solutions it can be concluded that clusters are randomly formed.", journal = "Solid State Ionics", title = "Structure and microstructure of SmxY2-xO3", volume = "101", pages = "495-501", doi = "10.1016/S0167-2738(97)00150-1" }
Mitrić, M., Kremenović, A. S., Dimitrijevic, R.,& Rodić, D.. (1997). Structure and microstructure of SmxY2-xO3. in Solid State Ionics, 101, 495-501. https://doi.org/10.1016/S0167-2738(97)00150-1
Mitrić M, Kremenović AS, Dimitrijevic R, Rodić D. Structure and microstructure of SmxY2-xO3. in Solid State Ionics. 1997;101:495-501. doi:10.1016/S0167-2738(97)00150-1 .
Mitrić, Miodrag, Kremenović, Aleksandar S., Dimitrijevic, R, Rodić, Dubravko, "Structure and microstructure of SmxY2-xO3" in Solid State Ionics, 101 (1997):495-501, https://doi.org/10.1016/S0167-2738(97)00150-1 . .