Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method
Samo za registrovane korisnike
2012
Autori
Milivojević, DušanBabić-Stojić, Branka S.
Jokanović, Vukoman R.
Jagličić, Zvonko
Branković, Dušan
Jović, Nataša G.
Čupić, Svetlana D.
Kojić, Dušan
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized by a sol-gel technique. Samples with various mass fractions of Co1+yAl2-yO4 in composite x, and with various Co concentrations in spinel y were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent ac susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration x of Co1+yAl2-yO4 in SiO2, showed very similar Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta a parts per thousand -100 K). Other samples, with lower x, showed complex behavior, spin-glass magnetic ...freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant.
Ključne reči:
Magnetic materials / Sol-gel preparation / Nanocomposites / Spin glass / ac susceptibilityIzvor:
Journal of Sol-gel Science and Technology, 2012, 63, 1, 56-64Finansiranje / projekti:
- Hemijsko i strukturno dizajniranje nanomaterijala za primenu u medicini i inženjerstvu tkiva (RS-MESTD-Basic Research (BR or ON)-172026)
DOI: 10.1007/s10971-012-2763-1
ISSN: 0928-0707
WoS: 000305684000008
Scopus: 2-s2.0-84863319071
Kolekcije
Institucija/grupa
VinčaTY - JOUR AU - Milivojević, Dušan AU - Babić-Stojić, Branka S. AU - Jokanović, Vukoman R. AU - Jagličić, Zvonko AU - Branković, Dušan AU - Jović, Nataša G. AU - Čupić, Svetlana D. AU - Kojić, Dušan PY - 2012 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4909 AB - Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized by a sol-gel technique. Samples with various mass fractions of Co1+yAl2-yO4 in composite x, and with various Co concentrations in spinel y were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent ac susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration x of Co1+yAl2-yO4 in SiO2, showed very similar Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta a parts per thousand -100 K). Other samples, with lower x, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant. T2 - Journal of Sol-gel Science and Technology T1 - Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method VL - 63 IS - 1 SP - 56 EP - 64 DO - 10.1007/s10971-012-2763-1 ER -
@article{ author = "Milivojević, Dušan and Babić-Stojić, Branka S. and Jokanović, Vukoman R. and Jagličić, Zvonko and Branković, Dušan and Jović, Nataša G. and Čupić, Svetlana D. and Kojić, Dušan", year = "2012", abstract = "Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 particles dispersed in an amorphous SiO2 matrix were synthesized by a sol-gel technique. Samples with various mass fractions of Co1+yAl2-yO4 in composite x, and with various Co concentrations in spinel y were studied. The grain sizes were below 100 nm with a large size distribution. The paper represents thorough investigation of magnetic properties, but special attention was given to peculiar effects and low temperature magnetic frozen states. Magnetic measurements reveal multiple magnetic ground states at the lowest temperature. The frequency dependent ac susceptibility measurements indicate spin-glass behavior of these ground states at low temperatures. The samples, with higher concentration x of Co1+yAl2-yO4 in SiO2, showed very similar Curie-Weiss paramagnetic behavior with antiferromagnetically interacting Co ions (theta a parts per thousand -100 K). Other samples, with lower x, showed complex behavior, spin-glass magnetic freezing at the lowest temperatures and lower absolute value of theta and consequently lower exchange constant.", journal = "Journal of Sol-gel Science and Technology", title = "Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method", volume = "63", number = "1", pages = "56-64", doi = "10.1007/s10971-012-2763-1" }
Milivojević, D., Babić-Stojić, B. S., Jokanović, V. R., Jagličić, Z., Branković, D., Jović, N. G., Čupić, S. D.,& Kojić, D.. (2012). Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method. in Journal of Sol-gel Science and Technology, 63(1), 56-64. https://doi.org/10.1007/s10971-012-2763-1
Milivojević D, Babić-Stojić BS, Jokanović VR, Jagličić Z, Branković D, Jović NG, Čupić SD, Kojić D. Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method. in Journal of Sol-gel Science and Technology. 2012;63(1):56-64. doi:10.1007/s10971-012-2763-1 .
Milivojević, Dušan, Babić-Stojić, Branka S., Jokanović, Vukoman R., Jagličić, Zvonko, Branković, Dušan, Jović, Nataša G., Čupić, Svetlana D., Kojić, Dušan, "Magnetic properties of Co1+yAl2-yO4-SiO2 nanocomposites synthesized by sol-gel method" in Journal of Sol-gel Science and Technology, 63, no. 1 (2012):56-64, https://doi.org/10.1007/s10971-012-2763-1 . .