Original title:
Studium struktury LaCuAl3 pomocí jaderné magnetické a kvadrupólové rezonance
Translated title:
Study of LaCuAl3 structure by means of nuclear magnetic and quadrupole resonance
Authors:
Sgallová, Ráchel ; Chlan, Vojtěch (advisor) ; Englich, Jiří (referee) Document type: Bachelor's theses
Year:
2017
Language:
cze Abstract:
[cze][eng] V rámci bakaláøské práce byla studována struktura LaCuAl3 na sérii prá¹- kových kovových vzorkù LaCuxAl4−x, x = 0,75; 0,9; 1 a 1,1 zejména s ohle- dem na lokální symetrii atomù La. Byla zmìøena spektra jaderné magnetické rezonance 63 Cu, 65 Cu, 27 Al a 139 La pøi pokojové teplotì v externím magne- tickém poli 9,4 T. Èást namìøených spekter byla srovnána se spektry simulo- vanými pro odhadnutí poètu neekvivalentních atomù ve struktuøe. Dále byl pozorován a diskutován vliv stechiometrie Al/Cu na spektra jaderné magne- tické rezonance. 1In the presented bachelor thesis the structure of LaCuAl3 was studied on a series of metallic powder samples LaCuxAl4−x, x = 0,75; 0,9; 1 and 1,1 especially with respect to the local symetry of La atoms. 63 Cu, 65 Cu, 27 Al and 139 La nuclear magnetic resonance spectra were measured at room tempera- ture in external magnetic eld of 9,4 T. Some of the measured spectra were compared with simulated ones in order to access the number of nonequiva- lent atoms in the structure. Furthermore, the effect of Al/Cu stoichiometry on nuclear magnetic resonance spectra was observed and diccussed. 1
Keywords:
LaCuAl3; nuclear magnetic resonance; nuclear quadrupole resonance; jaderná kvadrupólová rezonance; jaderná magnetická rezonance; LaCuAl3
Institution: Charles University Faculties (theses)
(web)
Document availability information: Available in the Charles University Digital Repository. Original record: http://hdl.handle.net/20.500.11956/86375