Naslov
Competing antiferromagnetism and local magnetic order in the bulk ceramic PZT–PFW multiferroic system: searching for the most promising ratio between PZT and PFW

Autori
Pajić, Damir ; Jagodič, Marko ; Jagličić, Zvonko ; Holc, Janez ; Kosec, Marija ; Trontelj, Zvonko

Izvornik
Journal of physics. D, Applied physics (0022-3727) 46 (2013), 45; 455001-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
magnetic ceramics; perovskites; magnetic nano-regions; multiferroics; slow magnetic dynamics; thermal activation

Sažetak
Bulk ceramic compounds of formula xPZT+(1−x)PFW, where PZT = Pb(Zr0.575Ti0.425)O3 and PFW = Pb(Fe2/3W1/3)O3, for x = 0.15 ; 0.20 ; 0.25 ; 0.37 ; 0.50 ; 0.60 ; 0.65 ; 0.70 and 0.80, were synthesized. In these single phase perovskites a change from rhombohedral to cubic structure is observed as the proportion of PFW increases. Magnetic investigations including zero-field cooled and field-cooled magnetization versus temperature measurements, magnetic hysteresis loops measurement and ac susceptibility measurements were performed. At high temperatures a clear antiferromagnetic (AFM)-like transition was observed for high PFW concentrations. The low temperature behaviour indicated spin freezing and thermal activation of magnetic moments and measurements confirmed the existence of a barrier maximum for x = 0.37. Competition between the long-range AFM order and short-range magnetic ordering of small nano-sized regions with finite magnetic moments was observed in the studied system.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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