Specific heat and muon spin resonance measurements in Gd(hfac)3NITiPr   molecular magnetic chains: indications for a chiral phase without long range   helical order
  Low temperature specific heat $C(T)$ and zero-field muon spin resonance ($\mu^+$SR) measurements were performed in Gd(hfac)$_3$NITiPr, 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 $T_0$=2.08$\pm$0.01K that disappears upon the application of a 5 Tesla magnetic field. Conversely, the $\mu^+$SR data do not present any anomaly at $T\approx 2$ K, proving the lack of divergence of the two-spin correlation function as required for usual three-dimensional (3D) long range helical order. Moreover, no muon spin precession can be evinced from the $\mu^+$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. 
A. Lascialfari, R. Ullu, M. Affronte, F. Cinti, A. Caneschi, D.   Gatteschi, D. Rovai, M.G. Pini, A. Rettori