Magnetic field-induced phase transitions in Cu(en)2SO4 – A dimerized S = 1/2 quantum antiferromagnet
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43934039" target="_blank" >RIV/60461373:22310/23:43934039 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jmmm.2023.171207" target="_blank" >https://doi.org/10.1016/j.jmmm.2023.171207</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jmmm.2023.171207" target="_blank" >10.1016/j.jmmm.2023.171207</a>
Alternative languages
Result language
angličtina
Original language name
Magnetic field-induced phase transitions in Cu(en)2SO4 – A dimerized S = 1/2 quantum antiferromagnet
Original language description
Magnetic susceptibility, magnetization and specific heat of powder and single crystal of Cu(en)2SO4 were investigated. The analysis of the data confirmed that Cu(en)2SO4 can be treated as a quasi-two-dimensional array of magnetic dimers with singlet-ground state persisting up to about 6.5 T. Magnetization and susceptibility studies were performed in the singlet phase and the analysis revealed that g-factor anisotropy is the main mechanism responsible for the different behavior in the magnetic field applied along the b and c axis. The investigation of powder and single crystal specific heat in magnetic fields applied along all three crystallographic directions revealed only small anisotropy associated with the g-factor anisotropy. All mentioned data sets resemble main features of the spin 1/2 HAF dimer model with J/kB = -5.52 K. The observed deviations can be ascribed to the presence of inter-dimer interactions with the effective strength z'J’/kB = -2.7 K. In fields above 6.5 T the system passes from the singlet phase to the ordered state stable up to about 11 T. The expectation of a dome shape magnetic phase diagram is based on the strong dimerization of the magnetic lattice. Future experiments and calculations are discussed to identify the origin of the quantum phase transition associated with the gap closing. © 2023 Elsevier B.V.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/GA21-02550S" target="_blank" >GA21-02550S: Plasmon induced excited spin state trapping in spin-crossover complexes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN
0304-8853
e-ISSN
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Volume of the periodical
586
Issue of the periodical within the volume
NOV 15 2023
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
6
Pages from-to
"171207/1"-6
UT code for WoS article
001080426700001
EID of the result in the Scopus database
2-s2.0-85170648699