Cation intermixing and ordering phenomenon in MO layer of MSr2YCu2Oz (M1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study

Details Cation intermixing and ordering phenomenon in MO layer of MSr2YCu2Oz (M1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study Cation intermixing and ordering phenomenon in MO layer of MSr2YCu2Oz (M1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study

2002-09-26

arxiv.org/abs/cond-mat/0209605v1

Physics

Condensed Matter

Superconductivity

Text with Figs, Submitted 47th MMM conf. USA

Scientific paper

10.1063/1.1544523

Various MSr2YCu2Oz (M1212 with M = Fe, Co, Al and Ga) compounds have been synthesized through a solid state reaction route. All these compounds are derived from the basic CuBa2YCu2O7 structure. Rietveld structural refinement of the room-temperature neutron diffraction data for Fe-1212 reveals that nearly half of Fe remains at the M site, while the other half goes to the Cu site in the CuO2 plane. For the M = Co, Al and Ga compounds, the basic unit cell gets doubled due to two distinct M sites in the M-O layer and the space group Ima2, without any cation intermixing is found more appropriate. For the M = Fe sample, magnetic ordering of Fe spins is seen from magnetization data below 70 K. In the case of the M = Co compound, a shallow down-turn in magnetic susceptibility is seen below 150 K, indicating low dimensional magnetic characteristics of the CoO layer. The compounds with M = Al and Ga show paramagnetic behaviour in their magnetization data down to 5 K. The oxygen content, established for each compound based on oxygen occupancies, refined from the neutron diffraction data comes close to 7.0 for each.

Affiliated with

Also associated with

No associations

Rating

Cation intermixing and ordering phenomenon in MO layer of MSr2YCu2Oz (M1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cation intermixing and ordering phenomenon in MO layer of MSr2YCu2Oz (M1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cation intermixing and ordering phenomenon in MO layer of MSr2YCu2Oz (M1212) compounds with M = Fe, Co, Al, and Ga: A neutron powder diffraction study will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-523395