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Specific Heat and Muon Spin Resonance Measurements in Gd(hfac)3NITiPr Molecular Magnetic Chains: Indications for a Chiral Phase without Long-range Helical Order (Articolo in rivista)

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Specific Heat and Muon Spin Resonance Measurements in Gd(hfac)3NITiPr Molecular Magnetic Chains: Indications for a Chiral Phase without Long-range Helical Order (Articolo in rivista) (literal)

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Lascialfari A., Ullu R., Cinti F., Caneschi A., Gatteschi D., Rovai D., Pini M.G., Rettori A. (2003)
Specific Heat and Muon Spin Resonance Measurements in Gd(hfac)3NITiPr Molecular Magnetic Chains: Indications for a Chiral Phase without Long-range Helical Order
in Physical review. B, Condensed matter and materials physics; American Physical Society (APS), College Pk (Stati Uniti d'America)
(literal)

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Lascialfari A., Ullu R., Cinti F., Caneschi A., Gatteschi D., Rovai D., Pini M.G., Rettori A. (literal)

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a I.N.F.M., Dipartimento di Fisica A. Volta, Università i Pavia, Via Bassi 6, I-27100 Pavia, Italy b I.N.F.M. - S3 Natl. Research Center, Dipartimento di Fisica, Universita di Modena e Reggio Emilia, Via G. Campi 213/A, I-41100 Modena, Italy c I.N.S.T.M., Dipartimento di Chimica, Università di Firenze, Via della Lastruccia 3, I-50019 Sesto Fiorentino (FI), Italy d Ist. di Fis. Applicata Nello Carrara, Consiglio Nazionale delle Ricerche, Via Panciatichi 56/30, I-50127 Firenze, Italy e I.N.F.M., Dipartimento di Fisica, Università di Firenze, Via G. Sansone 1, I-50019 Sesto Fiorentino (FI), Italy Hide additional affiliations (literal)

Titolo

Specific Heat and Muon Spin Resonance Measurements in Gd(hfac)3NITiPr Molecular Magnetic Chains: Indications for a Chiral Phase without Long-range Helical Order (literal)

Abstract

Low-temperature specific heat and zero-field muon spin resonance measurements were performed in Gd(hfac)3NITiPr, a quasi-one-dimensional molecular magnet with competing nearest-neighbor and next-nearest-neighbor intrachain exchange interactions. The specific heat data exhibit a lambda-peak at T=2.08 K that disappears upon the application of a 5-tesla magnetic field. Conversely, the muon spin resonance data do not present any anomaly in the neighbor of T=2 K, proving the lack of divergence of the two-spin correlation function as required for usual three-dimensional long-range helical order. Moreover, no muon spin precession can be evinced from the muon asimmetry curves, thus excluding the presence of a long-range-ordered magnetic lattice. These results provide indications for a low-T phase where chiral order is established in absence of long-range helical order. (literal)

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