Spin relaxation in 3Zn(PO3)(2). 2Mn(PO3)(2) phosphate glass - The role of low-energy vibrational modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F21%3A39916492" target="_blank" >RIV/00216275:25310/21:39916492 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925838820332746?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925838820332746?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2020.156910" target="_blank" >10.1016/j.jallcom.2020.156910</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spin relaxation in 3Zn(PO3)(2). 2Mn(PO3)(2) phosphate glass - The role of low-energy vibrational modes

Popis výsledku v původním jazyce

Thermodynamic and magnetic properties of 3Zn(PO3)(2)center dot 2Mn(PO3)(2) phosphate glass at wide temperature and magnetic field range were investigated. The study of static magnetic susceptibility and specific heat ruled out the formation of a spin glass state down to 0.41 K. Short-range order in the magnetic subsystem can be approximated by S = 5/2 antiferromagnetic dimers with weak uniaxial anisotropy. The results of alternating susceptibility studies revealed that below 10 K temperature-independent process dominates, which was ascribed to cross-tunneling relaxation. In contrast, thermally activated relaxation found at higher temperatures was identified as the Raman process. The analysis of the boson peak in lattice specific heat and thermal conductivity using soft potential model yielded the estimation of loffe-Riegel crossover (h) over bar omega(IR)/k(B) = 25.8K. Short-wavelength phonons with frequencies higher than omega(IR) are proposed to mediate Raman relaxation, whereas acoustic phonons remain inactive. (C) 2020 Elsevier B.V. All rights reserved.

Název v anglickém jazyce

Spin relaxation in 3Zn(PO3)(2). 2Mn(PO3)(2) phosphate glass - The role of low-energy vibrational modes

Popis výsledku anglicky

Thermodynamic and magnetic properties of 3Zn(PO3)(2)center dot 2Mn(PO3)(2) phosphate glass at wide temperature and magnetic field range were investigated. The study of static magnetic susceptibility and specific heat ruled out the formation of a spin glass state down to 0.41 K. Short-range order in the magnetic subsystem can be approximated by S = 5/2 antiferromagnetic dimers with weak uniaxial anisotropy. The results of alternating susceptibility studies revealed that below 10 K temperature-independent process dominates, which was ascribed to cross-tunneling relaxation. In contrast, thermally activated relaxation found at higher temperatures was identified as the Raman process. The analysis of the boson peak in lattice specific heat and thermal conductivity using soft potential model yielded the estimation of loffe-Riegel crossover (h) over bar omega(IR)/k(B) = 25.8K. Short-wavelength phonons with frequencies higher than omega(IR) are proposed to mediate Raman relaxation, whereas acoustic phonons remain inactive. (C) 2020 Elsevier B.V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

851

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

156910

Kód UT WoS článku

000579868900119

EID výsledku v databázi Scopus

2-s2.0-85090246182