We have studied the low-temperature (T) specific heat (C) of Li : Fe6 molecular magnets. The Schottky anomaly related to the singlet-triplet energy gap is shifted towards lower temperature as compared with that observed on Na:Fe6. This evidences the effects of the internal-guest substitution in these antiferromagnetically coupled iron(III) rings. The singlet-triplet energy gap (E(1)/k(B) = 14.2 +/- 0.4 K) and its zero-field splitting (D(1)/k(B) = 3.9 +/- 1.0 K) evaluated by the C-versus-T data fitting are compared to the values estimated by the high-field torque experiments. (C) 2000 Elsevier Science B.V, All rights reserved.
Low-temperature specific heat of Li : Fe6 molecular magnets / Affronte, Marco; Jc, Lasjaunias; Cornia, Andrea. - In: PHYSICA. B, CONDENSED MATTER. - ISSN 0921-4526. - STAMPA. - 284-288:II(2000), pp. 1233-1234. [10.1016/S0921-4526(99)02484-9]
Low-temperature specific heat of Li : Fe6 molecular magnets
AFFRONTE, Marco;CORNIA, Andrea
2000
Abstract
We have studied the low-temperature (T) specific heat (C) of Li : Fe6 molecular magnets. The Schottky anomaly related to the singlet-triplet energy gap is shifted towards lower temperature as compared with that observed on Na:Fe6. This evidences the effects of the internal-guest substitution in these antiferromagnetically coupled iron(III) rings. The singlet-triplet energy gap (E(1)/k(B) = 14.2 +/- 0.4 K) and its zero-field splitting (D(1)/k(B) = 3.9 +/- 1.0 K) evaluated by the C-versus-T data fitting are compared to the values estimated by the high-field torque experiments. (C) 2000 Elsevier Science B.V, All rights reserved.
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris
