Low-temperature specific heat C(T) and zero-field muon spin resonance (μ+SR) 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 λ peak at T0=2.08±0.01 K that disappears upon the application of a 5 T magnetic field. Conversely, the μ+SR data do not present any anomaly at 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 μ+SR 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.

Specific heat and mSR measurements in Gd(hfac)3NITiPr molecular magnetic chains: indications for a chiral phase without long range helical order / A., Lascialfari; R., Ullu; Affronte, Marco; F., Cinti; A., Caneschi; D., Gatteschi; D., Rovai; Mg, Pini; A., Rettori. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1550-235X. - STAMPA. - 67:(2003), pp. 224408-224415.

Specific heat and mSR measurements in Gd(hfac)3NITiPr molecular magnetic chains: indications for a chiral phase without long range helical order

AFFRONTE, Marco;
2003

Abstract

Low-temperature specific heat C(T) and zero-field muon spin resonance (μ+SR) 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 λ peak at T0=2.08±0.01 K that disappears upon the application of a 5 T magnetic field. Conversely, the μ+SR data do not present any anomaly at 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 μ+SR 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.
2003
67
224408
224415
Specific heat and mSR measurements in Gd(hfac)3NITiPr molecular magnetic chains: indications for a chiral phase without long range helical order / A., Lascialfari; R., Ullu; Affronte, Marco; F., Cinti; A., Caneschi; D., Gatteschi; D., Rovai; Mg, Pini; A., Rettori. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1550-235X. - STAMPA. - 67:(2003), pp. 224408-224415.
A., Lascialfari; R., Ullu; Affronte, Marco; F., Cinti; A., Caneschi; D., Gatteschi; D., Rovai; Mg, Pini; A., Rettori
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/309074
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