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Structural, electrochemical and magnetic characterization of the layered-type PrBa0.5Sr0.5Co2O5+δ perovskite
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dc.contributor.author | Azad, Abul Kalam | |
dc.contributor.author | Irvine, John Thomas Sirr | |
dc.contributor.author | Kim, Jung | |
dc.date.accessioned | 2014-08-15T10:01:04Z | |
dc.date.available | 2014-08-15T10:01:04Z | |
dc.date.issued | 2014-05 | |
dc.identifier | 106302980 | |
dc.identifier | 381bedb8-c545-4482-acc1-5d284035e47e | |
dc.identifier | 000334654500040 | |
dc.identifier | 84897103185 | |
dc.identifier | 000334654500040 | |
dc.identifier.citation | Azad , A K , Irvine , J T S & Kim , J 2014 , ' Structural, electrochemical and magnetic characterization of the layered-type PrBa0.5Sr0.5Co2O5+δ perovskite ' , Journal of Solid State Chemistry , vol. 213 , pp. 268-274 . https://doi.org/10.1016/j.jssc.2014.03.008 | en |
dc.identifier.issn | 0022-4596 | |
dc.identifier.other | ORCID: /0000-0002-8394-3359/work/68280745 | |
dc.identifier.uri | https://hdl.handle.net/10023/5170 | |
dc.description.abstract | Structural, electrical and magnetic properties of the layered cobaltite PrBa0.5Sr0.5Co2O5+δ have been investigated by means of neutron diffraction, electron diffraction, thermogravimetric analysis and SQUID magnetometry. Rietveld analysis of neutron diffraction data shows the ordered distribution of oxygen vacancies in [PrOδ] planes which doubles the lattice parameters from the simple perovskite cell parameter as a≈2ap and c≈2ap (ap is the cell parameter of the simple Perovskite) yielding tetragonal symmetry in the P4/mmm space group. On heating, above 573 K in air, structural rearrangement takes place and the structure can be defined as a≈ap and c≈2ap in the same space group. Oxygen occupancies have been determined as a function of temperature from neutron diffraction results. Initially (≥373 K), oxygen occupancy was increased and then decreased with increasing temperature. It was found that at 973 K the total oxygen loss is calculated about 0.265 oxygen/formula unit. Oxygen vacancy ordering was observed below 573 K, and the oxygen occupancy decreases as cell volume increases with increasing temperature. Area specific resistance (ASR) measurements show a resistance of 0.153 Ωcm2 and 0.286 Ωcm2 at 973 K and 923 K, respectively. On cooling, paramagnetic to ferromagnetic and an incomplete ferromagnetic to antiferromagnetic transition takes place. Different behaviours in field cooled and zero-field-cooled measurements leads to a coexistence of ferromagnetic and antiferromagnetic order. | |
dc.format.extent | 7 | |
dc.format.extent | 775478 | |
dc.format.extent | 2175928 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Solid State Chemistry | en |
dc.subject | Perovskite | en |
dc.subject | Solid solution | en |
dc.subject | Structure | en |
dc.subject | Neutron powder diffraction | en |
dc.subject | Magnetic properties | en |
dc.subject | QD Chemistry | en |
dc.subject.lcc | QD | en |
dc.title | Structural, electrochemical and magnetic characterization of the layered-type PrBa0.5Sr0.5Co2O5+δ perovskite | en |
dc.type | Journal article | en |
dc.contributor.sponsor | The Royal Society | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | 10.1016/j.jssc.2014.03.008 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | WRMA 2012/R2 | en |
dc.identifier.grantnumber | EP/K015540/1 | en |
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