Journal ArticleDOI
Etude comparative du comportement magnetique des phases LaNiO3 et LaCuO3
TLDR
In this article, the difference between the magnitudes and thermal evolutions of the magnetic susceptibilities are explained in terms of ferromagnetic vs antiferromagnetic superexchange enhancement and large vs small spin polarons associated with excited states.About:
This article is published in Materials Research Bulletin.The article was published on 1973-06-01. It has received 75 citations till now. The article focuses on the topics: Superexchange & Spin (physics).read more
Citations
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Journal ArticleDOI
The oxygen defect perovskite BaLa4Cu5O13.4, a metallic conductor
TL;DR: A new oxygen defect perovskite BaLa4Cu5O13.4, characterized by a mixed valence of copper has been isolated; the parameters of the tetragonal cell are closely related to that of the cubic perovsite:a = 8.644(4) A = a p 5√ and c = 3.867(3) A= a p as discussed by the authors.
Journal ArticleDOI
Localized to itinerant electronic transitions in transition-metal oxides with the perovskite structure
John B. Goodenough,Jianshi Zhou +1 more
TL;DR: In this paper, the transition from localized to itinerant electronic behavior is shown to be first-order in a perovskite, and segregation into localized and itinerant phases can be accomplished by cooperative atomic displacements.
Journal ArticleDOI
Electronic and magnetic properties of LaNi1−xCoxO3, LaCo1−xFexO3 and LaNi1−xFexO3
TL;DR: In this paper, Goodenough's energy band schemes were used to explain the itinerant d-electron behavior in LaNi 1− x Co x O 3 up to x = 0.5.
Journal ArticleDOI
Oxydes ternaires de cuivre a valence mixte de type K2NiF4 deficitaires en oxygene:Evolution progressive d'un etat semi-conducteur vers un etat semi-metallique des oxydes La2−xSrxCuO4−x2+δ
Ninh Nguyen,F. Studer,B. Raveau +2 more
TL;DR: In this article, the magnetic and electron transport properties of mixed valence copper oxides have been investigated in the temperature range 120-650 K. The positive sign of the Seebeck coefficient and the evolution of the conductivity and magnetic properties have been interpreted.
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Valence states and magnetic properties of LaNi1-xMnxO3 (for 0⩽x⩽0.2 and x=0.5)
TL;DR: In this paper, single-phase LaNi1-xMnxO3 samples in the compositional range 0 0.05 to 0.50 K were used to investigate the ferromagnetic spin glass properties of LaNi 1-mnx oxide.
References
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Journal ArticleDOI
Application of Gutzwiller's Variational Method to the Metal-Insulator Transition
W. F. Brinkman,T. M. Rice +1 more
TL;DR: In this article, it was shown that the approximate variational calculation of Gutzwiller predicts a metal-insulator transition as the intra-atomic Coulomb interaction is increased for the case of one electron per atom.
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Neutron-diffraction study of the magnetic properties of perovskite-like compounds LaBO3
W. C. Koehler,E.O. Wollan +1 more
TL;DR: In this paper, a neutron diffraction study has been carried out on the series of compounds LaBO 3 in which B is a trivalent ion of one of the 3-d transition group elements Cr, Mn, Fe, Co, and Ni.
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Exchange‐Enhanced Paramagnetism and Weak Ferromagnetism in the Ni3Al and Ni3Ga Phases; Giant Moment Inducement in Fe‐Doped Ni3Ga
TL;DR: In this paper, the shape of the reciprocal magnetic susceptibility vs temperature curves measured between 4.2° and 300°K is of the Stoner type and suggests for these alloys a density-of-states curve varying appreciably in the Fermi region leading to a low effective energy.
Journal ArticleDOI
Sur deux nouvelles phases oxygenees du cuivre trivalent: LaCuO3 et La2Li0, 50Cu0, 50O4
TL;DR: In this article, two new copper III + compounds have been prepared under oxygen pressure and investigated, and the first phase LaCuO3 has a distorded rhomboedral perovskite structure (a = 5.431 ± 0.002 A ; α = 60°51′ ± 0°02′) and the second phase La2Li0.50Cu0.
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Complex vs Band Formation in Perovskite Oxides
John B. Goodenough,P. M. Raccah +1 more
TL;DR: In this paper, it is argued that there is a critical cation-anion covalent mixing parameter λc such that ligand-field theory is appropriate for λ λ c.