The materials are named after the manganese ion which is a key ingredient of the compounds due to its mixed-valence state. Unlike the usual ferromagnetics, the transition of manganites to ferromagnetic state is accompanied by a drastic increase in conductivity. Such transition from an insulating ...
In the previous chapter, an electronic model was derived for the case of several nearly degenerate orbitals in a given ion. The resulting model, which included on site Coulombic interactions (4.17, 4.18), was found to be very general, and its applicability goes beyond the manganites into ...
The most important transition metal perovskites are orthoferrites RFeO3 (where R is yttrium or a rare-earth ion) and mixed valence manganites R1−xMxMnO3 (where M is a bivalent or monovalent cation such as Ca2+, Sr2+, Ba2+, Pb2+, Na+, and K+). All these compounds have a distort...
Solid State Ion. 15, 247 (1985) Article CAS Google Scholar A.K. Jonscher, M.S. Frost, Weakly frequency-dependent electrical conductivity in a chalcogenide glass. Thin Solid Films 37, 267 (1976) Article CAS Google Scholar R. Hanen, A. Mleiki, H. Rahmouni, N. Guermazi, K. Khiro...
We believe that these results will be useful for the development of high-efficiency cathodes in Li-ion batteries and catalysts. 展开 DOI: 10.1088/1742-6596/683/1/012042 年份: 2016 收藏 引用 批量引用 报错 分享 全部来源 免费下载 求助全文 IOP IOP (全网免费下载) dx.doi.org arXiv.org ads...
As a consequence, an important decoupling between the magnetic and the metal-insulator transition is found for ion irradiated films as opposed to the classical double exchange model scenario.doi:10.1103/PhysRevB.81.134439M. SirenaInstituto BalseiroA. Zimmers...
(oxygen ion displacements) after application of high voltages to the junction were revealed. Its effect is the enrichment of manganite surface layers by oxygen. After application of high biases, junction resistances were reduced and the ratio of peaks below and above 100meV was increased. These ...
Here we present a theoreticalstudy of the magnetic charges, and of the spin-lattice and spin-electronic MEconstants, in these hexagonal manganites and ferrites, clarifying theconditions under which exchange striction leads to an enhanced $Z^{m m}$values and anomalously large in-plane spin-...
Since the dominant magnetic ion is Mn and the AHE is driven by magnetism, it is logical to assume the majority of AHE resides within the SMO layers. Recent advances in understanding the AHE separates such materials into three categories: (i) the dirty metal limit where intrinsic and side jum...
(V) of the PrCaBaMnBiO manganite is smaller than that of PrCaBaMnO manganite. Although an increase in theVvalue was thought due to the larger ionic radius of the Bi ion, a decrease inVvalue was noticed [24]. It is thought that this decrease is a result of the chemical pressure ...