Preparation and properties of La0.67Pb0.33(Mn1-xFex)O3 compounds

Gritzner, G.; Koppe, Markus; Kellner, K.; Przewoźnik, J.; Chmist, J.; Kołodziejczyk, Andrzej; Krop, K.

doi:10.1007/s00339-005-3285-2

Cited by 14 publications

(13 citation statements)

References 10 publications

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“…2+ for La 3+ in the antiferromagnetic insulator LaMnO 3 gives rise to an equivalent amount of Mn 4+ which induces ferromagnetism (FM) and metallicity in (La 1−y Pb y )(Mn [1] due to the so-called double exchange interaction (DE). This interaction is associated with the hopping of the e g electron between Mn…”

Section: Substitution Of Pbmentioning

confidence: 99%

Electronic States of Collosal Magnetoresistive Manganites La_0.67Pb_0.33Mn_1-xFe_xO₃from Photoemission Spectroscopy

2010

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The electron photoemission spectra of valence bands and core-level states of manganese perovskite La0.67Pb0.33(Mn1−xFex)O3 with x = 0, 0.01, 0.03, 0.06, 0.10 and 0.15 were measured by the X-ray and Ultraviolet Photoemission Spectroscopy (XPS and UPS) below and above the metal-insulator transition. From analysis of the Mn 2p core-level spectra the ratio Mn 3+ /Mn 4+ was calculated as a function of the iron content. Comparison of the valence band spectrum with band structure calculations and with the high-resolution spectra measured at synchrotron radiation for Ca-, Ba-and Ce-substituted manganites revealed the strong hybridisation of Mn 3d and of O 2p states between −3 eV and −7 eV, and no estimated oxygen states between 0 eV and −2 eV where the Mn-3d states play a predominant role. The composition dependent insulating energy gaps were measured at room temperature. Reasons for the behaviour were discussed taking into account previous analysis of XPS/UPS spectra of other manganese perovskites.

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Section: Substitution Of Pbmentioning

confidence: 99%

Electronic States of Collosal Magnetoresistive Manganites La_0.67Pb_0.33Mn_1-xFe_xO₃from Photoemission Spectroscopy

2010

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“…4. Conclusion We computed the electronic band structure of La 2/3 Pb 1/3 MnO 3 on energy optimizated P 3c1 crystal structure originated from R-3c1 structure [17]. The calculations show that the ground-state has a half-metallic character with 1.85 eV gap for minority band.…”

Section: Results and Their Analysismentioning

confidence: 90%

“…167 according to International Tables for Crystallography (ITC) [17]. This structure was elongated twice in z direction and one of the third La ion positions were substituted by Pb.…”

Section: Computational Detailsmentioning

confidence: 99%

Electronic Band Structure and Photoemission States of La_2/3Pb_1/3MnO₃

et al. 2012

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We present the theoretical study of electronic and magnetic properties in a manganese perovskite La 2/3 Pb 1/3 MnO3. The calculations were carried out in frame of the rst-principles density functional theory with the general gradient approximation using the WIEN 2K package. The P 3c1 crystal structure was taken from the detailed X-ray diraction data for the perovskite. The exact exchange energy was utilized for Mn d electrons. Density of states was determined by the modied tetrahedron method. As a result we get a valence band for the spin up and down density of states with the gap for the latter of 1.85 eV. We noticed that conduction band is mainly dominated by d spin up manganese electrons and Mn (dxz, dyz) states have twice larger contribution than (d x 2 −y 2 , dxy). We attribute this to MnO6 octahedral tilting. From the same reason d 3z 2 −r 2 state has no contribution to the density of states at the Fermi energy (EF). Comparison of total density of states with the ultraviolet photoemission spectroscopy measurements shows similar features especially as far as the lead spectral intensity from the 6s electrons at about −10 eV is concerned. The calculated total magnetic moment per formula unit is 3.66 µB, the measured one 3.48 µB/f.u.

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“…No. of space group 167 according to International Tables for Crystallography (ITC) [20]). This structure was elongated two times in z direction and one third of La and Mn ion positions were substituted by Pb and Fe, respectively.…”

Section: Computational Detailsmentioning

confidence: 99%

Electronic Band Structure of La_2/3Pb_1/3Mn_2/3Fe_1/3O₃

2012

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Preparation and properties of La0.67Pb0.33(Mn1-xFex)O3 compounds

Cited by 14 publications

References 10 publications

Electronic States of Collosal Magnetoresistive Manganites La_0.67Pb_0.33Mn_1-xFe_xO₃from Photoemission Spectroscopy

Electronic States of Collosal Magnetoresistive Manganites La_0.67Pb_0.33Mn_1-xFe_xO₃from Photoemission Spectroscopy

Electronic Band Structure and Photoemission States of La_2/3Pb_1/3MnO₃

Electronic Band Structure of La_2/3Pb_1/3Mn_2/3Fe_1/3O₃

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Preparation and properties of La0.67Pb0.33(Mn1-xFex)O3 compounds

Cited by 14 publications

References 10 publications

Electronic States of Collosal Magnetoresistive Manganites La0.67Pb0.33Mn1-xFexO3from Photoemission Spectroscopy

Electronic States of Collosal Magnetoresistive Manganites La0.67Pb0.33Mn1-xFexO3from Photoemission Spectroscopy

Electronic Band Structure and Photoemission States of La2/3Pb1/3MnO3

Electronic Band Structure of La2/3Pb1/3Mn2/3Fe1/3O3

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Electronic States of Collosal Magnetoresistive Manganites La_0.67Pb_0.33Mn_1-xFe_xO₃from Photoemission Spectroscopy

Electronic States of Collosal Magnetoresistive Manganites La_0.67Pb_0.33Mn_1-xFe_xO₃from Photoemission Spectroscopy

Electronic Band Structure and Photoemission States of La_2/3Pb_1/3MnO₃

Electronic Band Structure of La_2/3Pb_1/3Mn_2/3Fe_1/3O₃