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The oxygen-deficient perovskite Ba"0"."5La"0"."5Fe"1"-"xCu"xO"2"."7"5" "-" "x"2" "+" "δ -A p-type semi-conductor with high Cu(III) and fe(IV) contents

Er-Rakho, L. ; Michel, C. ; Studer, F. ; [et al.]

Amsterdam : Elsevier

Journal of Physics and Chemistry of Solids 48 (1987), S. 377-382

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ISSN: 0022-3697

Keywords: Mossbauer spectroscopy ; Perovskite ; electrical conductivity ; magnetic susceptibility ; mixed-valence ; thermoelectric power

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Chemistry and Pharmacology , Physics

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0022-3697(87)90097-7

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The oxygen deficient perovskites AFe"1"-"xCu"xO"2"."5"-"x"2"+"δ (ASr,Ba) exhibiting mixed valence of iron and copper ions

Er-Rakho, L. ; Michel, C. ; Studer, F. ; [et al.]

Amsterdam : Elsevier

Journal of Physics and Chemistry of Solids 49 (1988), S. 1101-1106

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ISSN: 0022-3697

Keywords: Mossbauer spectroscopy ; Perovskite ; electrical conductivity ; magnetic susceptibility ; mixed valence ; thermoelectric power

Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Topics: Chemistry and Pharmacology , Physics

Type of Medium: Electronic Resource

URL: http://linkinghub.elsevier.com/retrieve/pii/0022-3697(88)90160-6

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Chromium doped manganites: evidence for electronically phase-separated systems (2000)

Toulemonde, O. ; Studer, F. ; Barnabé, A. ; [et al.]

Springer

The European physical journal 18 (2000), S. 233-240

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ISSN: 1434-6036

Keywords: PACS. 75.30.Vn Colossal magnetoresistance - 78.70.Dm X-ray absorption spectra - 75.25.+z Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract: X-ray absorption spectroscopy (XAS) and soft-X-ray magnetic circular dichroism (SXMCD) at the Mn L2,3-, Cr L2,3- and O-K edges of Sm0.5Ca0.5Mn1-xCrxO3 ( ) bulk polycrystalline samples have been performed at T=20 K below the ferromagnetic Curie temperature. We show the existence of a magnetic sublattice on each of the probed cations. Considering an electronically phase-separated system, results are compared with magnetization and resistivity measurements and a tentative correlation with magnetoresistance properties on such doped compounds is discussed.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/s100510070053

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