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Quantum versus classical nature of the low-temperature magnetic phase transition in TbAl.sub.3./sub.(BO.sub.3./sub.).sub.4./sub.
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SYSNO ASEP 0563775 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Quantum versus classical nature of the low-temperature magnetic phase transition in TbAl3(BO3)4 Tvůrce(i) Zajarniuk, T. (PL)
Szewczyk, A. (PL)
Gutowska, M.U. (PL)
Puźniak, R. (PL)
Szymczak, H. (PL)
Gudim, I. (RU)
Bedarev, V. A. (UA)
Pashchenko, Mariia (FZU-D)
Tomczak, P. (PL)
Szuszkiewicz, W. (PL)Celkový počet autorů 10 Číslo článku 094418 Zdroj.dok. Physical Review B. - : American Physical Society - ISSN 2469-9950
Roč. 105, č. 9 (2022)Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova specific heat ; magnetization ; quantum fluctuations ; ferromagnetic ordering Vědní obor RIV BM - Fyzika pevných látek a magnetismus Obor OECD Condensed matter physics (including formerly solid state physics, supercond.) Způsob publikování Omezený přístup Institucionální podpora FZU-D - RVO:68378271 UT WOS 000771570100002 EID SCOPUS 85126954433 DOI 10.1103/PhysRevB.105.094418 Anotace Specific heat C-B of a TbAl3(BO3)(4) crystal was studied for 50 mK < T < 300 K with emphasis on T < 1 K where a phase transition was found at T-c = 0.68 K. Nuclear, nonphonon (C-m), and lattice contributions to C-B were separated. Lowering of T-c with an increase in magnetic field parallel to the easy magnetization axis (B-parallel to) was found. It was established that C-m and a Gruneisen ratio depend on B-parallel to and T in a way characteristic of systems in which a classical transition is driven by quantum fluctuations (QFs) to a quantum critical point at T = 0 by tuning a control parameter (B-parallel to). The B-parallel to T phase diagram was constructed, and the dynamical critical exponent 0.82 <= z <= 0.96 was assessed. Nature of the transition was not established explicitly. Magnetization studies point at the ferromagnetic ordering of Tb3+ magnetic moments, however, lowering of T-c with increase in B-parallel to is opposite to the classical behavior. Hence, a dominant role of QFs was supposed. Pracoviště Fyzikální ústav Kontakt Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Rok sběru 2023 Elektronická adresa https://doi.org/10.1103/PhysRevB.105.094418
Počet záznamů: 1