Experimental Study of the Thermal Transport in CsNiF3 - An S=1 Quantum Chain

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F12%3A00440208" target="_blank" >RIV/68081723:_____/12:00440208 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Study of the Thermal Transport in CsNiF3 - An S=1 Quantum Chain

Popis výsledku v původním jazyce

The heat transport in a single-crystal of CsNiF3 has been performed in the temperature range from 2 K to 7 K in a zero magnetic field, B = 0, as well as in sufficiently large magnetic fields, B = 6 T and 9 T, inducing the ferromagnetic ground state alongthe hard c-axis. CsNiF3 represents an S = 1 quasi-one-dimensional XY ferromagnet with the intra-chain exchange coupling J/k(B) approximate to 24 K, single-ion anisotropy D/k(B) approximate to 8 K, and ordering temperature T-N = 2.7 K. Comparison of thephonon and magnon velocities suggests that phonons are the main heat carriers in this magnetic insulator. The thermal conductivity in B = 0 was analysed in the frame of a standard Debye model. The temperature dependence of the effective phonon mean freepath was calculated from the experimental data, and the enhancement of the phonon mean free path in B not equal 0 was obtained, indicating that magnons act as scattering centers for phonons.

Název v anglickém jazyce

Experimental Study of the Thermal Transport in CsNiF3 - An S=1 Quantum Chain

Popis výsledku anglicky

The heat transport in a single-crystal of CsNiF3 has been performed in the temperature range from 2 K to 7 K in a zero magnetic field, B = 0, as well as in sufficiently large magnetic fields, B = 6 T and 9 T, inducing the ferromagnetic ground state alongthe hard c-axis. CsNiF3 represents an S = 1 quasi-one-dimensional XY ferromagnet with the intra-chain exchange coupling J/k(B) approximate to 24 K, single-ion anisotropy D/k(B) approximate to 8 K, and ordering temperature T-N = 2.7 K. Comparison of thephonon and magnon velocities suggests that phonons are the main heat carriers in this magnetic insulator. The thermal conductivity in B = 0 was analysed in the frame of a standard Debye model. The temperature dependence of the effective phonon mean freepath was calculated from the experimental data, and the enhancement of the phonon mean free path in B not equal 0 was obtained, indicating that magnons act as scattering centers for phonons.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

ACTA PHYSICA POLONICA A

ISSN

0587-4246

e-ISSN

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Svazek periodika

121

Číslo periodika v rámci svazku

5-6

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

4

Strana od-do

1098-1101

Kód UT WoS článku

000304789500033

EID výsledku v databázi Scopus

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