Redox chemistry and magnetism of LaSrM0.5Ru0.5O4 +/-delta (M = Co, Ni and Zn) Ruddlesden-Popper phases
文献类型：期刊论文
| 作者 | Lu MF ; Deng XL ; Waerenborgh JC ; Wu XJ ; Meng J |
| 刊名 | dalton transactions
 |
| 出版日期 | 2012 |
| 卷号 | 41期号:37页码:11507-11518 |
| 关键词 | RAY PHOTOELECTRON-SPECTROSCOPY DOUBLE PEROVSKITES CRYSTAL-STRUCTURE TRANSPORT-PROPERTIES LAYERED PEROVSKITE CATALYSTS OXIDES CATION BA MAGNETIZATION |
| ISSN号 | 1477-9226 |
| 通讯作者 | lu mf |
| 中文摘要 | the n = 1 ruddlesden-popper (rp) phases lasrm0.5ru0.5o4 +/-delta (m = co, ni and zn) have been prepared by solid state reactions and structurally characterized by powder x-ray and electron diffraction. all the samples adopt the tetragonal i4/mmm space group with random m and ru cation occupation on the b-sites. the potential causes of no cation ordering are discussed. a combined analysis of the tolerance factors, the distortion of the octahedral coordination of m and ru cations and the magnetic interactions between m and ru cations provide a better understanding for forming a phase with 3d cation ordering on the b-sites in the n = 1 rp phases. the investigation of xps spectra suggests that the transition element species exist as mixed ion pairs, ru(4-delta)+-ru4+ <-> co2+-co3+ in lasrco0.5ru0.5o4, and ru4+-ru(4+delta)+ <-> ni+-ni2+ in lasrni0.5ru0.5o4, which is consistent with cation disorder over the b sites. lasrco0.5ru0.5o4 shows a weakly ferromagnetic behaviour below 50 k; lasrni0.5ru0.5o4 is evidenced by the presence of long-range magnetic ordering at a neel temperature of 125 k, and lasrzn0.5ru0.5o4 exhibits a paramagnetic behaviour down to 5 k. due to atomic disorder, ru4d, o2p covalent coupling is weakened, strengthening the intraatomic spin-spin coupling among the pi* electrons. charge transfer between ru and co or ru and ni, as well as the increasing overlap of both nearest-neighbour and next-nearest-neighbour ru 4d electrons due to atomic disorder, favour the formation of ferromagnetic interactions. although antiferromagnetism is dominant, particularly in lasrni0.5ru0.5o4, ferromagnetic interactions are stronger in the title compounds than in the related la2mruo6 (m = co, ni) double perovskites where the b-site cations are ordered. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000308361400034 |
| 公开日期 | 2013-06-30 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/48454]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Lu MF,Deng XL,Waerenborgh JC,et al. Redox chemistry and magnetism of LaSrM0.5Ru0.5O4 +/-delta (M = Co, Ni and Zn) Ruddlesden-Popper phases[J]. dalton transactions,2012,41(37):11507-11518. |
| APA | Lu MF,Deng XL,Waerenborgh JC,Wu XJ,&Meng J.(2012).Redox chemistry and magnetism of LaSrM0.5Ru0.5O4 +/-delta (M = Co, Ni and Zn) Ruddlesden-Popper phases.dalton transactions,41(37),11507-11518. |
| MLA | Lu MF,et al."Redox chemistry and magnetism of LaSrM0.5Ru0.5O4 +/-delta (M = Co, Ni and Zn) Ruddlesden-Popper phases".dalton transactions 41.37(2012):11507-11518. |
入库方式： OAI收割
来源：长春应用化学研究所
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