S=1/2 Heisenberg antiferromagnetic spin chain [Cu(dmbpy)(H2O)(2)SO4] (dmbpy=4,4 '-dimethyl-2,2 '-bipyridine): Synthesis, crystal structure and enhanced magnetocaloric effect

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10271608" target="_blank" >RIV/00216208:11320/14:10271608 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.solidstatesciences.2013.12.003" target="_blank" >http://dx.doi.org/10.1016/j.solidstatesciences.2013.12.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.solidstatesciences.2013.12.003" target="_blank" >10.1016/j.solidstatesciences.2013.12.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

S=1/2 Heisenberg antiferromagnetic spin chain [Cu(dmbpy)(H2O)(2)SO4] (dmbpy=4,4 '-dimethyl-2,2 '-bipyridine): Synthesis, crystal structure and enhanced magnetocaloric effect

Popis výsledku v původním jazyce

[Cu(dmbpy)(H2O)(2)SO4] in the form of small blue crystals was prepared from the aqueous-ethanolic reaction mixture formed of CuSO4 and dmbpy (dmbpy = 4,4'-dimethyl-2,2'-bipyridine). Its crystal structure consists of chains in which hexacoordinated Cu(II)atoms are linked by (mu(2)-SO4)(2-) anions. The Cu(II) atom exhibits elongated tetragonal bipyramidal coordination with one chelate bonded dmbpy and two aqua ligands placed in the equatorial plane while the axial positions are occupied by bridging sulfato ligands. The study of electron spin resonance and specific heat enabled to identify the studied material as an S = 1/2 Heisenberg antiferromagnetic chain with weak intrachain exchange interaction, 2J/k(B) = -1.12 K and a small anisotropy of g - factor, Delta g/g approximate to 0.1. The analysis of the magnetic entropy revealed pronounced release of the entropy at the saturation magnetic field, which for spin chains induces quantum phase transition, namely B-sat = 1.56 T. The maximum i

Název v anglickém jazyce

S=1/2 Heisenberg antiferromagnetic spin chain [Cu(dmbpy)(H2O)(2)SO4] (dmbpy=4,4 '-dimethyl-2,2 '-bipyridine): Synthesis, crystal structure and enhanced magnetocaloric effect

Popis výsledku anglicky

[Cu(dmbpy)(H2O)(2)SO4] in the form of small blue crystals was prepared from the aqueous-ethanolic reaction mixture formed of CuSO4 and dmbpy (dmbpy = 4,4'-dimethyl-2,2'-bipyridine). Its crystal structure consists of chains in which hexacoordinated Cu(II)atoms are linked by (mu(2)-SO4)(2-) anions. The Cu(II) atom exhibits elongated tetragonal bipyramidal coordination with one chelate bonded dmbpy and two aqua ligands placed in the equatorial plane while the axial positions are occupied by bridging sulfato ligands. The study of electron spin resonance and specific heat enabled to identify the studied material as an S = 1/2 Heisenberg antiferromagnetic chain with weak intrachain exchange interaction, 2J/k(B) = -1.12 K and a small anisotropy of g - factor, Delta g/g approximate to 0.1. The analysis of the magnetic entropy revealed pronounced release of the entropy at the saturation magnetic field, which for spin chains induces quantum phase transition, namely B-sat = 1.56 T. The maximum i

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

<a href="/cs/project/LM2011025" target="_blank" >LM2011025: LMNT - Laboratoře magnetizmu a nízkých teplot - provoz a rozvoj národní výzkumné infrastruktury</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Solid State Sciences

ISSN

1293-2558

e-ISSN

—

Svazek periodika

28

Číslo periodika v rámci svazku

únor

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

6

Strana od-do

14-19

Kód UT WoS článku

000332442700003

EID výsledku v databázi Scopus

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