Nanostructure and paramagnetic behaviour of NiZn ferrite spherical particles

@article{citeulike:1670224, abstract = {NiZn ferrite particles were prepared by ultrasonic spray pyrolysis with a mixed solution of aqueous metal nitrates. A nanoporous structure of the NiZn ferrite particles was observed by electron microscopy. The structure formed with nanosized primary particles of about 10 nm or less before annealing, which showed paramagnetic behaviour measured at 77 K and room temperature. The typical abnormal intraparticle growth like polyhedral primary particles was observed by annealing at 1000 °C with a dependency on Zn concentration. The NiZn ferrite particles showed a magnetization of over 19 emu/g and coercivity of over 550 Oe at a low temperature below 50 K due to the magnetic behaviour of the nanostructured primary particles. M\"{o}ssbauer studies showed that the NiZn ferrite particles as prepared before annealing had a paramagnetic ratio of about 44\%, but a normal ferrimagnetic structure after annealing at 1000 °C. ({\copyright} 2004 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim)}, address = {Electronic Components \& Materials Division, Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Republic of Korea}, author = {Nam, Joong-Hee and Kim, Won K. and Park, Sang J. and Yeo, Dong-Hun and Kim, Hyo T. }, citeulike-article-id = {1670224}, doi = {10.1002/pssa.200304629}, journal = {physica status solidi (a)}, keywords = {nebulizer, paramagnetic, particles, spheres, ultrasonic}, number = {8}, pages = {1846--1850}, posted-at = {2007-09-18 20:19:25}, priority = {2}, title = {Nanostructure and paramagnetic behaviour of NiZn ferrite spherical particles}, url = {http://dx.doi.org/10.1002/pssa.200304629}, volume = {201}, year = {2004} }

TY - JOUR ID - citeulike:1670224 L3 - citeulike-article-id:1670224 TI - Nanostructure and paramagnetic behaviour of NiZn ferrite spherical particles JF - physica status solidi (a) VL - 201 IS - 8 SP - 1846 EP - 1850 AD - Electronic Components & Materials Division, Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Republic of Korea N2 - NiZn ferrite particles were prepared by ultrasonic spray pyrolysis with a mixed solution of aqueous metal nitrates. A nanoporous structure of the NiZn ferrite particles was observed by electron microscopy. The structure formed with nanosized primary particles of about 10 nm or less before annealing, which showed paramagnetic behaviour measured at 77 K and room temperature. The typical abnormal intraparticle growth like polyhedral primary particles was observed by annealing at 1000 °C with a dependency on Zn concentration. The NiZn ferrite particles showed a magnetization of over 19 emu/g and coercivity of over 550 Oe at a low temperature below 50 K due to the magnetic behaviour of the nanostructured primary particles. Mössbauer studies showed that the NiZn ferrite particles as prepared before annealing had a paramagnetic ratio of about 44%, but a normal ferrimagnetic structure after annealing at 1000 °C. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) KW - nebulizer KW - paramagnetic KW - particles KW - spheres KW - ultrasonic AU - Nam, Joong-Hee AU - Kim, Won AU - Park, Sang AU - Yeo, Dong-Hun AU - Kim, Hyo PY - 2004/// UR - http://dx.doi.org/10.1002/pssa.200304629 ER -