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Statements

Subject Item
n2:RIV%2F00216224%3A14310%2F06%3A00016898%21RIV10-MSM-14310___
rdf:type
skos:Concept n14:Vysledek
dcterms: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.
dcterms: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
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
skos:notation
RIV/00216224:14310/06:00016898!RIV10-MSM-14310___
n3:aktivita
n7:Z
n3:aktivity
Z(MSM0021622410)
n3:cisloPeriodika
22
n3:dodaniDat
n8:2010
n3:domaciTvurceVysledku
n11:1834282 n11:1647652
n3:druhVysledku
n15:J
n3:duvernostUdaju
n6:S
n3:entitaPredkladatele
n17:predkladatel
n3:idSjednocenehoVysledku
496382
n3:idVysledku
RIV/00216224:14310/06:00016898
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Raman scattering; infrared spectroscopy; La1-xSrxMnO3; Mn substitution; oxygen disorder; local modes
n3:klicoveSlovo
n5:infrared%20spectroscopy n5:Raman%20scattering n5:oxygen%20disorder n5:La1-xSrxMnO3 n5:local%20modes n5:Mn%20substitution
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[2EF22EC9F6BD]
n3:nazevZdroje
Physical Review B
n3:obor
n10:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
6
n3:rokUplatneniVysledku
n8:2006
n3:svazekPeriodika
73
n3:tvurceVysledku
Popovic, Zoran Sapina, Fernando Abrashev, Miroslav Vergilov Dubroka, Adam Humlíček, Josef Cantarero, Andres
n3:zamer
n18:MSM0021622410
s:issn
1098-0121
s:numberOfPages
10
n13:organizacniJednotka
14310