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Statements

Subject Item
n2:RIV%2F68378271%3A_____%2F12%3A00381823%21RIV15-GA0-68378271
rdf:type
n7:Vysledek skos:Concept
dcterms:description
The temperature dependences of the refractive index, n(T), calculated from ellipsometric data during the premartensitic and martensite transitions in a Ni2MnGa ferromagnetic shape memory alloy allow to detect all critical temperatures of the sample. The performed measurements reveal the behavior of a surface layer of a few tens nanometers depth due to the light absorption. The underlying mechanisms of the observed temperature changes of the equilibrium n0 may be related to temperature dependent interactions between free electrons and phonons as well as between electrons and defects.A giant isothermal creep (up to 20%) of the refractive index was found for temperatures below T0 = 315 K. Below T0 the creep amplitude grows with the temperature difference T0 - T. The creep disappears and the relaxation time becomes zero at temperatures about T0 . The temperature dependences of the refractive index, n(T), calculated from ellipsometric data during the premartensitic and martensite transitions in a Ni2MnGa ferromagnetic shape memory alloy allow to detect all critical temperatures of the sample. The performed measurements reveal the behavior of a surface layer of a few tens nanometers depth due to the light absorption. The underlying mechanisms of the observed temperature changes of the equilibrium n0 may be related to temperature dependent interactions between free electrons and phonons as well as between electrons and defects.A giant isothermal creep (up to 20%) of the refractive index was found for temperatures below T0 = 315 K. Below T0 the creep amplitude grows with the temperature difference T0 - T. The creep disappears and the relaxation time becomes zero at temperatures about T0 .
dcterms:title
Ellipsometry applied to phase transitions and relaxation phenomena in Ni2MnGa ferromagnetic shape memory alloy Ellipsometry applied to phase transitions and relaxation phenomena in Ni2MnGa ferromagnetic shape memory alloy
skos:prefLabel
Ellipsometry applied to phase transitions and relaxation phenomena in Ni2MnGa ferromagnetic shape memory alloy Ellipsometry applied to phase transitions and relaxation phenomena in Ni2MnGa ferromagnetic shape memory alloy
skos:notation
RIV/68378271:_____/12:00381823!RIV15-GA0-68378271
n4:aktivita
n15:Z n15:P
n4:aktivity
P(GAP108/12/1941), P(TA01010517), Z(AV0Z10100522)
n4:cisloPeriodika
14
n4:dodaniDat
n18:2015
n4:domaciTvurceVysledku
Dejneka, Alexandr n14:5193222 Tyunina, Marina n14:6219144
n4:druhVysledku
n5:J
n4:duvernostUdaju
n10:S
n4:entitaPredkladatele
n8:predkladatel
n4:idSjednocenehoVysledku
134134
n4:idVysledku
RIV/68378271:_____/12:00381823
n4:jazykVysledku
n19:eng
n4:klicovaSlova
shape memory alloy; ellipsometry; Ni2MnGa
n4:klicoveSlovo
n13:Ni2MnGa n13:ellipsometry n13:shape%20memory%20alloy
n4:kodStatuVydavatele
US - Spojené státy americké
n4:kontrolniKodProRIV
[B4879CE9A3CE]
n4:nazevZdroje
Applied Physics Letters
n4:obor
n16:BM
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
8
n4:projekt
n12:TA01010517 n12:GAP108%2F12%2F1941
n4:rokUplatneniVysledku
n18:2012
n4:svazekPeriodika
101
n4:tvurceVysledku
Zablotskyy, Vitaliy A. Sánchez-Alarcos, V. Tyunina, Marina Dejneka, Alexandr Pérez-Landazábal, J. I. Recarte, V. Chernenko, V. A. Jastrabík, Lubomír
n4:wos
000309603300042
n4:zamer
n17:AV0Z10100522
s:issn
0003-6951
s:numberOfPages
5
n3:doi
10.1063/1.4757393