Fingerprints of field-induced Berezinskii-Kosterlitz-Thouless transition in quasi-two-dimensional S=1/2 Heisenberg magnets Cu(en)(H2O)(2)SO4 and Cu(tn)Cl-2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10324607" target="_blank" >RIV/00216208:11320/16:10324607 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.jmmm.2015.12.025" target="_blank" >http://dx.doi.org/10.1016/j.jmmm.2015.12.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmmm.2015.12.025" target="_blank" >10.1016/j.jmmm.2015.12.025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fingerprints of field-induced Berezinskii-Kosterlitz-Thouless transition in quasi-two-dimensional S=1/2 Heisenberg magnets Cu(en)(H2O)(2)SO4 and Cu(tn)Cl-2

Popis výsledku v původním jazyce

Organo-metallic compounds Cu(en)(H2O)(2)SO4 (en=C2H8N2) and Cu(tn)Cl-2 (tn=C3H10N2) representing S = 1/2 quasi-two-dimensional Heisenberg antiferromagnets with an effective intra-layer exchange coupling J/k(B) approximate to 3 K, have been examined by specific heat measurements at temperatures down to nominally 50 mK and magnetic fields up to 14 T. A comparative analysis of magnetic specific heat in zero magnetic field revealed nearly identical contribution of short-range magnetic correlations and significant differences were observed at lowest temperatures. A phase transition to long-range order was observed in Cu(en)(H2O)(2)SO4 at T-c=0.9 K while hidden in Cu(tn)Cl-2. A response of both compounds to the application of magnetic field has rather universal features characteristic for a field-induced Berezinskii-Kosterlitz-Thouless transition theoretically predicted for ideal two-dimensional magnets.

Název v anglickém jazyce

Fingerprints of field-induced Berezinskii-Kosterlitz-Thouless transition in quasi-two-dimensional S=1/2 Heisenberg magnets Cu(en)(H2O)(2)SO4 and Cu(tn)Cl-2

Popis výsledku anglicky

Organo-metallic compounds Cu(en)(H2O)(2)SO4 (en=C2H8N2) and Cu(tn)Cl-2 (tn=C3H10N2) representing S = 1/2 quasi-two-dimensional Heisenberg antiferromagnets with an effective intra-layer exchange coupling J/k(B) approximate to 3 K, have been examined by specific heat measurements at temperatures down to nominally 50 mK and magnetic fields up to 14 T. A comparative analysis of magnetic specific heat in zero magnetic field revealed nearly identical contribution of short-range magnetic correlations and significant differences were observed at lowest temperatures. A phase transition to long-range order was observed in Cu(en)(H2O)(2)SO4 at T-c=0.9 K while hidden in Cu(tn)Cl-2. A response of both compounds to the application of magnetic field has rather universal features characteristic for a field-induced Berezinskii-Kosterlitz-Thouless transition theoretically predicted for ideal two-dimensional magnets.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Magnetism and Magnetic Materials

ISSN

0304-8853

e-ISSN

—

Svazek periodika

404

Číslo periodika v rámci svazku

Květen

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

53-57

Kód UT WoS článku

000367482500008

EID výsledku v databázi Scopus

2-s2.0-84949492028