Strain effect on magnetic-exchange-induced phonon splitting in NiO films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00532988" target="_blank" >RIV/68378271:_____/20:00532988 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1361-648X/ab9f08" target="_blank" >https://doi.org/10.1088/1361-648X/ab9f08</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-648X/ab9f08" target="_blank" >10.1088/1361-648X/ab9f08</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strain effect on magnetic-exchange-induced phonon splitting in NiO films

Popis výsledku v původním jazyce

NiO thin films with various strains were grown on SrTiO3 (STO) and MgO substrates using a pulsed laser deposition technique.The variation of in-plane strain from -0.36% (compressive) to 0.48% (tensile) yields the decrease of the phonon frequency from 409.6 cm-1 to 377.5 cm-1which occurs due to the ~1% change of interatomic distances. The magnetic exchange-driven phonon splitting Δω was measured as a function of temperature. The Δω increases on cooling in NiO relaxed film. The splitting increases on cooling also in 0.48% tensile strained film, but Δω is systematically 3-4 cm-1 smaller than in relaxed film. Since the phonon splitting is proportional to the non-dominant magnetic exchange interaction J1, the reduction of phonon splitting in tensile-strained film was explained by a diminishing of J1 with lattice expansion.n

Název v anglickém jazyce

Strain effect on magnetic-exchange-induced phonon splitting in NiO films

Popis výsledku anglicky

NiO thin films with various strains were grown on SrTiO3 (STO) and MgO substrates using a pulsed laser deposition technique.The variation of in-plane strain from -0.36% (compressive) to 0.48% (tensile) yields the decrease of the phonon frequency from 409.6 cm-1 to 377.5 cm-1which occurs due to the ~1% change of interatomic distances. The magnetic exchange-driven phonon splitting Δω was measured as a function of temperature. The Δω increases on cooling in NiO relaxed film. The splitting increases on cooling also in 0.48% tensile strained film, but Δω is systematically 3-4 cm-1 smaller than in relaxed film. Since the phonon splitting is proportional to the non-dominant magnetic exchange interaction J1, the reduction of phonon splitting in tensile-strained film was explained by a diminishing of J1 with lattice expansion.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physics: Condensed Matter

ISSN

1361-648X

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

40

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

1-8

Kód UT WoS článku

000551798500001

EID výsledku v databázi Scopus

2-s2.0-85088022774