Magnetic behavior of Ba3Cu3Sc4O12
DSpace at IIT Bombay
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Title |
Magnetic behavior of Ba3Cu3Sc4O12
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Creator |
KOTESWARARAO, B
MAHAJAN, AV BERT, F MENDELS, P CHAKRABORTY, J SINGH, V DASGUPTA, I RAYAPROL, S SIRUGURI, V HOSER, A KAUSHIK, SD |
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Subject |
TIGHT-BINDING
OXIDE |
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Description |
The chain-like system Ba3Cu3Sc4O12 has potentially interesting magnetic properties due to the presence of Cu2+ and a structure-suggested low dimensionality. We present magnetization M versus magnetic field H and temperature T, T-and H-dependent heat-capacity C-p, Sc-45 nuclear magnetic resonance (NMR), muon spin rotation (mu SR), neutron diffraction measurements and electronic structure calculations for Ba3Cu3Sc4O12. The onset of magnetic long-range antiferromagnetic (AF) order at T-N similar to 16 K is consistently evidenced from the whole gamut of our data. A significant sensitivity of T-N to the applied magnetic field H (T-N similar to 0 K for H = 70 kOe) is also reported. Coupled with a ferromagnetic Curie-Weiss temperature (theta(CW) similar to 65 K) in the susceptibility (from a 100 to 300 K fit), it is indicative of competing ferromagnetic and antiferromagnetic interactions. These indications are corroborated by our density functional theory based electronic structure calculations, where we find the presence of significant ferromagnetic couplings between some copper ions whereas AF couplings were present between some others. Our experimental data, backed by our theoretical calculations, rule out the one-dimensional magnetic behavior suggested by the structure and the observed long-range order is due to the presence of non-negligible magnetic interactions between adjacent as well as next-nearest chains.
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Publisher |
IOP PUBLISHING LTD
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Date |
2014-10-16T06:10:40Z
2014-10-16T06:10:40Z 2012 |
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Type |
Article
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Identifier |
JOURNAL OF PHYSICS-CONDENSED MATTER, 24(23)
0953-8984 1361-648X http://dx.doi.org/10.1088/0953-8984/24/23/236001 http://dspace.library.iitb.ac.in/jspui/handle/100/15421 |
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Language |
en
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