About: Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes

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About: Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present results of our study of polarized Raman scattering and infrared reflectivity of rhombohedral ceramic La1-ySryMn1-xMxO3 manganites in the temperature range between 77 and 320 K. In our samples, a part of the Mn atoms is substituted by M = Cr, Co, Cu, Zn, Sc, or Ga with x in the range 0-0.1. The hole concentration was kept at the optimal value of about 32% by tuning the Sr content y. We have monitored distortions of the oxygen sublattice by the presence of broad bands in the Raman spectra, the increase of dc resistivity extracted from the infrared reflectivity, and the change of the critical temperature of the ferromagnetic transition. Our results support the idea that these properties are mainly determined by the radius of the substituent ion, its electronic and magnetic structure playing only a minor role. Furthermore, the Raman spectra exhibit an additional Ag-like high frequency mode attributed to the local breathing vibration of oxygens surrounding the substituent ion. We present results of our study of polarized Raman scattering and infrared reflectivity of rhombohedral ceramic La1-ySryMn1-xMxO3 manganites in the temperature range between 77 and 320 K. In our samples, a part of the Mn atoms is substituted by M = Cr, Co, Cu, Zn, Sc, or Ga with x in the range 0-0.1. The hole concentration was kept at the optimal value of about 32% by tuning the Sr content y. We have monitored distortions of the oxygen sublattice by the presence of broad bands in the Raman spectra, the increase of dc resistivity extracted from the infrared reflectivity, and the change of the critical temperature of the ferromagnetic transition. Our results support the idea that these properties are mainly determined by the radius of the substituent ion, its electronic and magnetic structure playing only a minor role. Furthermore, the Raman spectra exhibit an additional Ag-like high frequency mode attributed to the local breathing vibration of oxygens surrounding the substituent ion. (en)
Title	Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes (en)
skos:prefLabel	Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes (en)
skos:notation	RIV/00216224:14310/06:00016898!RIV10-MSM-14310___
http://linked.open...avai/riv/aktivita	Z
http://linked.open...avai/riv/aktivity	Z(MSM0021622410)
http://linked.open...iv/cisloPeriodika	22
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Humlíček, Josef Dubroka, Adam
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	496382
http://linked.open...ai/riv/idVysledku	RIV/00216224:14310/06:00016898
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Raman scattering; infrared spectroscopy; La1-xSrxMnO3; Mn substitution; oxygen disorder; local modes (en)
http://linked.open.../riv/klicoveSlovo	La1-xSrxMnO3 Mn substitution local modes oxygen disorder Raman scattering infrared spectroscopy
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[2EF22EC9F6BD]
http://linked.open...i/riv/nazevZdroje	Physical Review B
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	73
http://linked.open...iv/tvurceVysledku	Dubroka, Adam Humlíček, Josef Abrashev, Miroslav Vergilov Cantarero, Andres Popovic, Zoran Sapina, Fernando
http://linked.open...n/vavai/riv/zamer	Physical and chemical properties of advanced materials and structures
issn	1098-0121
number of pages	10 (xsd:int)
http://localhost/t...ganizacniJednotka	14310
is http://linked.open...avai/riv/vysledek of	Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes Raman and infrared studies of La1-ySryMn1-xMxO3 (M=Cr, Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes

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