Enhancement of Ferromagnetism in the Colossal-Magnetoresistance Layered Manganite La_1.2Ba_1.8Mn_2-xRu_x O₇ (x = 0, 0.1, 0.5, and 1)

Authors: Sudhakar, Nori; Rajeev, K.P.; Nigam, A.K.

Source: Journal of Electronic Materials, Volume 33, Number 11, November 2004 , pp. 1264-1268(5)

Publisher: Springer

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Abstract:

Electrical transport and magnetic measurements of the Ru-doped, layered manganite system, La_1.2Ba_1.8Mn_2-xRu_xO₇ (x = 0, 0.1, 0.5, and 1), have been carried out in the temperature range of 5-310 K and in the presence of magnetic fields up to 10 T. The magnetic transition temperatures are found to be above room temperature, and colossal magnetoresistance (CMR) is present at low temperatures and even close to room temperature. Magnetoresistance (MR) is found to obey power-law behavior as a function of applied field with an exponent close to 0.5 at low temperatures.

Keywords: MANGANITES; SPIN GLASSES; COLOSSAL MAGNETORESISTANCE (CMR); MAGNETIZATION CURVES

Document Type: Research article

Publication date: 2004-11-01