Spin Induced Quantum Tunneling of the Magnetization

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dc.authoridDIKICI YILDIZ, Gokcen/0000-0002-5751-0795
dc.authoridYILDIZ, Yasin Gokturk/0000-0002-1391-1888
dc.contributor.authorYildiz, Gokcen Dikici
dc.contributor.authorYildiz, Yasin Gokturk
dc.contributor.authorSarli, Numan
dc.date.accessioned2025-01-21T16:44:31Z
dc.date.available2025-01-21T16:44:31Z
dc.date.issued2021
dc.departmentKırıkkale Üniversitesi
dc.description.abstractQuantum tunneling of the magnetization (QTM) of the spin-1/2 Vanadium-15 (V15) single molecular magnets (SMMs) is investigated by means of the effective field theory developed by Kaneyoshi. We deal with the two hexagon layers (shell, VS) and one triangular interlayer (core, VC) with the spin-1/2 Ising particles. We find that the V15 has a normal ferromagnetic hysteresis behavior for its all spins are up (parallel). However, V15 has a staircase-like hysteresis behavior that is the signature of the QTM for the spin-down orientation (antiparallel) of the core. QTM appears with the splitting of the magnetizations versus temperature (M-T) and external field (M-H) curves. Namely, QTM occurs from +m(VC1) to -m(VC2)(|m(VC1)|>|m(VC2)|) in the core, from +m(VS1) to +m(VS2) (|m(VS1)|>|m(VS2)|) in the shell (only mVS-H curves at T> 0.1) and from +M1(V15) to +M2(V15) (|M1V15|>|M2V15|) in the total V15. By considering these different splitting behaviors of the magnetizations of the shell, core and total V15 at TT-C, we suggest three different kinds of QTM: 1-ferromagnetic QTM (FMQTM) at TT-C for the shell, core and total V15 SMM. Moreover, it is found that there is a relationship between the QTM and type II and surface superconductivity. The EFT results of QTM in V15 are in good agreement with the other theoretical and experimental results of the V15 and other SMMs.
dc.identifier.doi10.1142/S2010324721500119
dc.identifier.issn2010-3247
dc.identifier.issn2010-3255
dc.identifier.issue2
dc.identifier.urihttps://doi.org/10.1142/S2010324721500119
dc.identifier.urihttps://hdl.handle.net/20.500.12587/25477
dc.identifier.volume11
dc.identifier.wosWOS:000630956800001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherWorld Scientific Publ Co Pte Ltd
dc.relation.ispartofSpin
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241229
dc.subjectQuantum tunneling of the magnetization; single molecular magnet; Vanadium-15 (V-15); superconductivity; effective field theory
dc.titleSpin Induced Quantum Tunneling of the Magnetization
dc.typeArticle

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