Role of Ag in La 1-xAg xMnO 3 manganite perovskite

Q. Y. Xu; R. P. Wang; Z. Zhang

doi:10.1103/PhysRevB.71.092401

Role of Ag in La _1-xAg _xMnO ₃ manganite perovskite

Q. Y. Xu^*
, R. P. Wang
, Z. Zhang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

Electron-energy-loss spectroscopy (EELS) has been used to study the element contents of the grains in the bulk polycrystalline La _1-xAg _xMnO ₃ ceramic samples prepared by conventional solid-state reaction process in air. Only characterized core-shell ionization-edge EELS spectra of La, Mn, and O were observed while no spectrum of Ag was detected, indicating that Ag is not doped into manganite perovskites. However, it was found by electron spin resonance investigation that the ferromagnetic phase is enhanced with the increase of the nominal Ag composition and reaches its maximum around x=0.35 in the ferromagnetic and paramagnetic coexistence of La _1-xAg _xMnO ₃ systems. The unique role of Ag was ascribed to the introduction of oxygen into manganite perovskites, leading to further oxidation of manganite perovskite grains.

Original language	English
Article number	092401
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevB.71.092401
Publication status	Published - 1 Mar 2005
Externally published	Yes

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title = "Role of Ag in La 1-xAg xMnO 3 manganite perovskite",

abstract = "Electron-energy-loss spectroscopy (EELS) has been used to study the element contents of the grains in the bulk polycrystalline La 1-xAg xMnO 3 ceramic samples prepared by conventional solid-state reaction process in air. Only characterized core-shell ionization-edge EELS spectra of La, Mn, and O were observed while no spectrum of Ag was detected, indicating that Ag is not doped into manganite perovskites. However, it was found by electron spin resonance investigation that the ferromagnetic phase is enhanced with the increase of the nominal Ag composition and reaches its maximum around x=0.35 in the ferromagnetic and paramagnetic coexistence of La 1-xAg xMnO 3 systems. The unique role of Ag was ascribed to the introduction of oxygen into manganite perovskites, leading to further oxidation of manganite perovskite grains.",

author = "Xu, \{Q. Y.\} and Wang, \{R. P.\} and Z. Zhang",

year = "2005",

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T1 - Role of Ag in La 1-xAg xMnO 3 manganite perovskite

AU - Xu, Q. Y.

AU - Wang, R. P.

AU - Zhang, Z.

PY - 2005/3/1

Y1 - 2005/3/1

N2 - Electron-energy-loss spectroscopy (EELS) has been used to study the element contents of the grains in the bulk polycrystalline La 1-xAg xMnO 3 ceramic samples prepared by conventional solid-state reaction process in air. Only characterized core-shell ionization-edge EELS spectra of La, Mn, and O were observed while no spectrum of Ag was detected, indicating that Ag is not doped into manganite perovskites. However, it was found by electron spin resonance investigation that the ferromagnetic phase is enhanced with the increase of the nominal Ag composition and reaches its maximum around x=0.35 in the ferromagnetic and paramagnetic coexistence of La 1-xAg xMnO 3 systems. The unique role of Ag was ascribed to the introduction of oxygen into manganite perovskites, leading to further oxidation of manganite perovskite grains.

AB - Electron-energy-loss spectroscopy (EELS) has been used to study the element contents of the grains in the bulk polycrystalline La 1-xAg xMnO 3 ceramic samples prepared by conventional solid-state reaction process in air. Only characterized core-shell ionization-edge EELS spectra of La, Mn, and O were observed while no spectrum of Ag was detected, indicating that Ag is not doped into manganite perovskites. However, it was found by electron spin resonance investigation that the ferromagnetic phase is enhanced with the increase of the nominal Ag composition and reaches its maximum around x=0.35 in the ferromagnetic and paramagnetic coexistence of La 1-xAg xMnO 3 systems. The unique role of Ag was ascribed to the introduction of oxygen into manganite perovskites, leading to further oxidation of manganite perovskite grains.

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U2 - 10.1103/PhysRevB.71.092401

DO - 10.1103/PhysRevB.71.092401

M3 - Article

SN - 1098-0121

VL - 71

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 9

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ER -

Role of Ag in La _1-xAg _xMnO ₃ manganite perovskite

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