𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Nickel Oxidation State and Magnetic Properties of Hole-Doped and Reduced Nd2−xSrxNiOyCompounds

✍ Scribed by M. Jiménez-Ruiz; C. Prieto; J.L. Martı́nez; J.M. Alonso

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
322 KB
Volume
140
Category
Article
ISSN
0022-4596

No coin nor oath required. For personal study only.

✦ Synopsis

The Ni K-edge XANES of reduced Nd 2-x Sr x NiO 4 samples shows an increase of Ni 3؉ content with Sr 3؉ concentration. The appearance of mixed valence Ni 2؉ /Ni 3؉ produces a change in the magnetic properties of the system. The Nd 3؉ sublattice orders antiferromagnetically at T N &13-20 K for x ‫؍‬ 0.4, 0.5, and 0.6, due to the interactions of Ni-Nd sublattices. For x ‫؍‬ 0.8 this order begins to disappear because of the effect of the low spin state Ni 3؉ created at the NiO 4 planes. Additionally, the reduced family Nd 2-x Sr x NiO y ( y < 4) shows the disappearance of Ni 3؉ , the decrease of Ni 2؉ with respect to the nonreduced form, and the appearance of Ni ؉ . All the compounds of the reduced family show AF order at low temperature.

📜 SIMILAR VOLUMES

Electronic properties of electron-doped
Electronic properties of electron-doped Nd2−xCexCuO4, Sr1−xNdxCuO2 and hole-doped Nd1.4Ce0.2Sr0.4CuO4 studied by photoelectron spectroscopy
✍ M. Klauda; J. Markl; C. Fink; P. Lunz; G. Saemann-Ischenko; F. Rau; K.-J. Range 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 130 KB

We present investigations on the electronic structure of electron doped Nd2-x-CexCuO4\_fi and Srl\_xNdxCuO2-8 (infinite layer compound) as well as hole doped Ndl.4Ce0.2Sr0.4CuO4\_sby means of photoelectron spectroscopy and auxiliary measurements. The CuO-layers of electron type HTSC exhibit a compar

The optical properties of the doped hole
The optical properties of the doped holes in Bi2Sr2(Ca,Nd)Cu2O8+δ and (Nd,Sr)CoO3
✍ I. Terasaki; T. Nakahashi; S. Takebayashi; A. Maeda; K. Uchinokura 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 390 KB

The optical reflectivity spectra of Bi2Sr2(Ca,Nd)Cu208+5 and (Nd,Sr)CoOa were measured in the range from 0.03 to 3 eV, and transformed to the optical conductivity through the Kramers-Kronig relation. The obtained conductivity spectra for doped samples have a broad absorption in the mid-infrared regi

Superconducting and normal-state propert
Superconducting and normal-state properties of electron-doped cuprates: Ln2−xCexCuO4−δ and Nd2CuO4−x−δFx
✍ J.P. Ströbel; M. Klauda; M. Lippert; B. Hensel; G. Saemann-Ischenko; W. Gerhäuse 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 130 KB

The HMl-coefficient turns out to be negative over the whole temperature range. Critical fields H,I(T) and Hc2(T) are evaluated. Applying and removing magnetic fields of 7T causes a permanent change of the superconducting properties of bulk-samples.