Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2417
Title: Ti-rich double perovskites LnCu(3-y)Ti(2-x)Mn(2+x+y)O(12): ferrimagnetism and magnetoresistance up to room temperature
Authors: Seikh, Md. Motin
Caignaert, V.
Sundaresan, A.
De, Chandan
Raveau, B.
Keywords: Materials Science
Applied Physics
Pressure
Issue Date: 2014
Publisher: Royal Society of Chemistry
Citation: Seikh, MM; Caignaert, V; Sundaresan, A; De, C; Raveau, B, Ti-rich double perovskites LnCu(3-y)Ti(2-x)Mn(2+x+y)O(12): ferrimagnetism and magnetoresistance up to room temperature. Journal of Materials Chemistry C 2014, 2 (30) 6061-6067, http://dx.doi.org/10.1039/c4tc00932k
Journal of Materials Chemistry C
2
30
Abstract: Ti-rich double perovskites LnCu(3-y)Ti(2-x)Mn(2+x+y)O(12) have been synthesized at normal pressure, with a wide homogeneity range, 0 < x < 0.5 and 0 < y <= 1. ALL these oxides are ferrimagnetic, with T-C ranging from 160 K to 293 K, in spite of the high 3d(0)-Ti content in the octahedral sites. The evolution of T-C can be monitored on the basis of three factors-antiferromagnetic superexchange interactions Cu2+up arrow-O-Mn3+/4+down arrow-O-Cu2+up arrow, double exchange Mn4+-O-Mn3+ interactions in the octahedral sites and chemical pressure due to the size effect of Ln(3+). Differently from high pressure synthesized manganites, these oxides exhibit maximum magnetoresistance at T-C, similar to single perovskite manganites. Intrinsic magnetoresistance can thus be obtained at room temperature, but with a smaller amplitude compared to single manganites, due to the dilution effect of titanium.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2417
ISSN: 2050-7526
Appears in Collections:Research Articles (Sundaresan A.)

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