Structural instability and lattice site occupation of Mn2+ ions in the SrTiO3 quantum paraelectric

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU152408" target="_blank" >RIV/00216305:26620/24:PU152408 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00588423

Výsledek na webu

<a href="https://journals.aps.org/prb/abstract/10.1103/PhysRevB.110.024114" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/PhysRevB.110.024114</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.110.024114" target="_blank" >10.1103/PhysRevB.110.024114</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structural instability and lattice site occupation of Mn2+ ions in the SrTiO3 quantum paraelectric

Popis výsledku v původním jazyce

Strontium titanate (SrTiO3) is the most known material from the family of quantum paraelectrics. Thanks to its extremely "soft" lattice, its functionality can be easily tuned by applying both external stimuli (pressure, strain, electric field) and through doping or isotope exchange. In this paper, we present the results of a detailed study of two Mn2+ centers in Mn-doped SrTiO3 single crystals using both continuous wave and pulsed electron paramagnetic resonance (EPR) spectroscopy at frequencies from 9.5 to 427 GHz and temperatures from 5 to 296 K. The first center is created by a Mn2+ ion at the Sr2+ lattice site in an off-center position. Its spectroscopic characteristics were determined for both fast and slow motion regimes of the impurity ion. In particular, all spin transitions allowed by the Mn2+ spin were well resolved in the slow motion regime. The second center is created by a Mn2+ ion at the Ti4+ position in the center of the oxygen octahedron. It has been established that the surrounding of this ion undergoes strong distortion when cooled below the phase transition temperature Tc = 105 K, stimulated by the rotation of the oxygen octahedron. The present data also perfectly explain the previously obtained EPR data from measurements of SrTiO3:Mn ceramics at low microwave frequencies (9-10 GHz).

Název v anglickém jazyce

Structural instability and lattice site occupation of Mn2+ ions in the SrTiO3 quantum paraelectric

Popis výsledku anglicky

Strontium titanate (SrTiO3) is the most known material from the family of quantum paraelectrics. Thanks to its extremely "soft" lattice, its functionality can be easily tuned by applying both external stimuli (pressure, strain, electric field) and through doping or isotope exchange. In this paper, we present the results of a detailed study of two Mn2+ centers in Mn-doped SrTiO3 single crystals using both continuous wave and pulsed electron paramagnetic resonance (EPR) spectroscopy at frequencies from 9.5 to 427 GHz and temperatures from 5 to 296 K. The first center is created by a Mn2+ ion at the Sr2+ lattice site in an off-center position. Its spectroscopic characteristics were determined for both fast and slow motion regimes of the impurity ion. In particular, all spin transitions allowed by the Mn2+ spin were well resolved in the slow motion regime. The second center is created by a Mn2+ ion at the Ti4+ position in the center of the oxygen octahedron. It has been established that the surrounding of this ion undergoes strong distortion when cooled below the phase transition temperature Tc = 105 K, stimulated by the rotation of the oxygen octahedron. The present data also perfectly explain the previously obtained EPR data from measurements of SrTiO3:Mn ceramics at low microwave frequencies (9-10 GHz).

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

<a href="/cs/project/GA23-05578S" target="_blank" >GA23-05578S: Řízení spinových qubitů v kvantových paraelektrikách pomocí elektrického pole</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

PHYSICAL REVIEW B

ISSN

2469-9950

e-ISSN

2469-9969

Svazek periodika

110

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

„“-„“

Kód UT WoS článku

001284794700003

EID výsledku v databázi Scopus

2-s2.0-85199942552