Size effect in nanocrystalline manganites La1-xA xMnO3 with A = Ag, Sr / Teplykh A.E., Bogdanov S.G., Valiev E.Z., Pirogov A.N., Dorofeev Yu.A., Ostroushko A.A., Udilov A.E., Kazantzev V.A. // Physica B: Condensed Matter. - 2004. - V. 350, l. 4. - P. 55-58.

ISSN:

09214526

Type:

Conference Paper

Abstract:

Nanocrystalline manganites La0.9Ag0.1MnO3, La0.7Ag0.3MnO3, and La0.7Sr 0.3MnO3 have been synthesized by pyrolysis and subjected to isothermal annealing. The atomic, magnetic, and mesoscopic structures of these manganites were investigated using magnetic measurements as well as X-ray and neutron diffraction. Particles of sizes ranging from 30-40 to 600-700nm coalesced with an increase in the annealing temperature from 600°C to 1300°C. All investigated samples had a rhombohedral structure and were ferromagnetic. The Curie temperature of the samples containing silver decreased while that of the samples containing strontium increased with the annealing temperature (i.e. with the growth in particle size). The magnetization of the Mn ions increased with annealing in all three systems. It is reasonable to assume that the growing size of the nanoparticles lead to an increased magnetization owing to the reduction of the angle between the nearest magnetic moments of the Mn ions. © 2004 Elsevier B.V. All rights reserved.

Author keywords:

Crystal and magnetic structure; Nanocrystalline manganites; Size effect

Index keywords:

Annealing; Ferromagnetic materials; Isotherms; Magnetic moments; Magnetization; Nanostructured materials; Neutron diffraction; Particle size analysis; Reduction; Surface structure; Synthesis (chemical

DOI:

10.1016/j.physb.2004.03.252

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-3242657344&doi=10.1016%2fj.physb.2004.03.252&partnerID=40&md5=8f5fbdf1fe567e92b646191a3e1ad939

Соавторы в МНС:

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Другие поля

Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-3242657344&doi=10.1016%2fj.physb.2004.03.252&partnerID=40&md5=8f5fbdf1fe567e92b646191a3e1ad939
Affiliations	Institute for Metal Physics, Ural Division, RAS, 620219 Ekaterinburg, Russian Federation; Ural States University, 620083 Ekaterinburg, Russian Federation
Author Keywords	Crystal and magnetic structure; Nanocrystalline manganites; Size effect
References	Coey, J.M.D., Viret, M., Von Molnar, S., (1999) Adv. Phys., 48 (2), p. 167; Salamon, M.B., Jaime, M., (2001) Rev. Mod. Phys., 73, p. 583; Zhang, N., Yang, W., Ding, W., Xing, D., Du, Y., (1999) Sol. State Commun., 109, p. 537; Sanchez, R.D., Rivas, J., Vazquez-Vazquez, C., Lopez-Quintela, A., Causa, M.T., Tovar, M., Oseroff, S., (1996) Appl. Phys. Lett., 68 (1), p. 134
Correspondence Address	Teplykh, A.E.; Institute for Metal Physics, Ural Division, RAS, 620219 Ekaterinburg, Russian Federation; email: teplykh@uraltc.ru
CODEN	PHYBE
Language of Original Document	English
Abbreviated Source Title	Phys B Condens Matter
Source	Scopus