Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics
Samo za registrovane korisnike
2017
Autori
Perać, SanjaSavić, Slavica M.
Branković, Zorica
Jaglicic, Zvonko
Vrtnik, Stanislav
Branković, Goran
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Polycrystalline samples of NaCo2-xCuxO4 (x=0, 0.01, 0.03 and 0.05) were synthesized in two different ways: 1) by a mechanochemically assisted solid-state reaction method (MASSR) and 2) by a citric acid complex method (CAC). In this work we examined the influence of these synthesis routes and small Cu concentrations on magnetic properties and the heat capacity of sintered samples. The magnetic susceptibility (chi) of all samples followed the Curie-Weiss law in the temperature range between 50 K and 300 K, while a negative Weiss constant (theta) implied an antiferromagnetic interaction. According to the magnetic susceptibility data, a peak around 30 K indicating the presence of Co3O4 as a secondary phase appeared for all MASSR samples and CAC samples with Cu content above 1%. The effective magnetic moment (mu(eff)) of CAC samples was lower than the theoretical, spin only value obtained for the Co4+ ion in the low spin state indicating the presence of low spin Co3+(S = 0). These values we...re also lower compared to the values obtained for MASSR samples. The highest mu(eff) of 1.75 mu B/atom Co was obtained for the undoped MASSR sample. The heat capacity of CAC samples at 2 K decreased with Cu concentration due to lowering of the electronic specific heat coefficient (gamma). The highest gamma of 63.9 mJ/molK(2) was obtained for the undoped CAC sample. This reduction in gamma values was the result of the decrease of the density of state and/or mass enhancement factor.
Ključne reči:
Solid state reaction / Sintering / Powders: chemical preparation / Magnetic properties / Heat capacityIzvor:
Ceramics International, 2017, 43, 2, 2022-2026Izdavač:
- Elsevier Sci Ltd, Oxford
Finansiranje / projekti:
- 0-3D nanostrukture za primenu u elektronici i obnovljivim izvorima energije: sinteza, karakterizacija i procesiranje (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45007)
DOI: 10.1016/j.ceramint.2016.10.170
ISSN: 0272-8842
WoS: 000390732100052
Scopus: 2-s2.0-85005766545
Institucija/grupa
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Perać, Sanja AU - Savić, Slavica M. AU - Branković, Zorica AU - Jaglicic, Zvonko AU - Vrtnik, Stanislav AU - Branković, Goran PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1029 AB - Polycrystalline samples of NaCo2-xCuxO4 (x=0, 0.01, 0.03 and 0.05) were synthesized in two different ways: 1) by a mechanochemically assisted solid-state reaction method (MASSR) and 2) by a citric acid complex method (CAC). In this work we examined the influence of these synthesis routes and small Cu concentrations on magnetic properties and the heat capacity of sintered samples. The magnetic susceptibility (chi) of all samples followed the Curie-Weiss law in the temperature range between 50 K and 300 K, while a negative Weiss constant (theta) implied an antiferromagnetic interaction. According to the magnetic susceptibility data, a peak around 30 K indicating the presence of Co3O4 as a secondary phase appeared for all MASSR samples and CAC samples with Cu content above 1%. The effective magnetic moment (mu(eff)) of CAC samples was lower than the theoretical, spin only value obtained for the Co4+ ion in the low spin state indicating the presence of low spin Co3+(S = 0). These values were also lower compared to the values obtained for MASSR samples. The highest mu(eff) of 1.75 mu B/atom Co was obtained for the undoped MASSR sample. The heat capacity of CAC samples at 2 K decreased with Cu concentration due to lowering of the electronic specific heat coefficient (gamma). The highest gamma of 63.9 mJ/molK(2) was obtained for the undoped CAC sample. This reduction in gamma values was the result of the decrease of the density of state and/or mass enhancement factor. PB - Elsevier Sci Ltd, Oxford T2 - Ceramics International T1 - Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics EP - 2026 IS - 2 SP - 2022 VL - 43 DO - 10.1016/j.ceramint.2016.10.170 ER -
@article{ author = "Perać, Sanja and Savić, Slavica M. and Branković, Zorica and Jaglicic, Zvonko and Vrtnik, Stanislav and Branković, Goran", year = "2017", abstract = "Polycrystalline samples of NaCo2-xCuxO4 (x=0, 0.01, 0.03 and 0.05) were synthesized in two different ways: 1) by a mechanochemically assisted solid-state reaction method (MASSR) and 2) by a citric acid complex method (CAC). In this work we examined the influence of these synthesis routes and small Cu concentrations on magnetic properties and the heat capacity of sintered samples. The magnetic susceptibility (chi) of all samples followed the Curie-Weiss law in the temperature range between 50 K and 300 K, while a negative Weiss constant (theta) implied an antiferromagnetic interaction. According to the magnetic susceptibility data, a peak around 30 K indicating the presence of Co3O4 as a secondary phase appeared for all MASSR samples and CAC samples with Cu content above 1%. The effective magnetic moment (mu(eff)) of CAC samples was lower than the theoretical, spin only value obtained for the Co4+ ion in the low spin state indicating the presence of low spin Co3+(S = 0). These values were also lower compared to the values obtained for MASSR samples. The highest mu(eff) of 1.75 mu B/atom Co was obtained for the undoped MASSR sample. The heat capacity of CAC samples at 2 K decreased with Cu concentration due to lowering of the electronic specific heat coefficient (gamma). The highest gamma of 63.9 mJ/molK(2) was obtained for the undoped CAC sample. This reduction in gamma values was the result of the decrease of the density of state and/or mass enhancement factor.", publisher = "Elsevier Sci Ltd, Oxford", journal = "Ceramics International", title = "Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics", pages = "2026-2022", number = "2", volume = "43", doi = "10.1016/j.ceramint.2016.10.170" }
Perać, S., Savić, S. M., Branković, Z., Jaglicic, Z., Vrtnik, S.,& Branković, G.. (2017). Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics. in Ceramics International Elsevier Sci Ltd, Oxford., 43(2), 2022-2026. https://doi.org/10.1016/j.ceramint.2016.10.170
Perać S, Savić SM, Branković Z, Jaglicic Z, Vrtnik S, Branković G. Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics. in Ceramics International. 2017;43(2):2022-2026. doi:10.1016/j.ceramint.2016.10.170 .
Perać, Sanja, Savić, Slavica M., Branković, Zorica, Jaglicic, Zvonko, Vrtnik, Stanislav, Branković, Goran, "Antiferromagnetism and heat capacity of NaCo2-xCuxO4 ceramics" in Ceramics International, 43, no. 2 (2017):2022-2026, https://doi.org/10.1016/j.ceramint.2016.10.170 . .