2017/01/23 by R. S. Solanki, Shang‐Hsien Hsieh, S. -H. Hsieh +10 · 9 citations
Chemistry · Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Chemistry #Condensed matter physics #Crystallography #Inelastic neutron scattering #Intensity (physics) #Magnetic field #Magnetization #Metallic Glasses and Amorphous Alloys #Neutron scattering #Physics #Quantum mechanics #Scattering #Spin (aerodynamics) #Spin glass #Spins #Theoretical and Computational Physics #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevb.95.024425
published in Physical review. B./Physical review. B 95(2) (American Physical Society) · 20 pages, 7 figures
openalex publication_date 2017/01/23 · openalex created_date 2017/02/03 · arxiv created 2017/03/03 · arxiv updated 2017/03/30 · openalex updated_date 2026/08/05
Elastic and inelastic neutron scattering (ENS and INS) experiments were performed on a single crystal of (Ni0.4Mn0.6)TiO3 (NMTO) to study the spatial correlations and dynamics of spins in the XY-like spin-glass (SG) state. Magnetization measurements reveal signatures of SG behavior in NMTO with a freezing temperature of TSG\ensuremath∼9.1\phantom\rule0.16em0exK. The ENS experiments indicate that the intensity of magnetic diffuse scattering starts to increase around 12 K, which is close to TSG. Also, spin-spin correlation lengths (\ensuremathξ) at 1.5 K are approximately (21\ifmmode±\else\textpm\fi1) and (73\ifmmode±\else\textpm\fi2)\phantom\rule0.16em0ex\AA in the interlayer and the in-plane directions, respectively, demonstrating that magnetic correlations in NMTO exhibit quasi-two-dimensional antiferromagnetic order. In addition, critical exponent (\ensuremathβ) is determined to be 0.37\ifmmode±\else\textpm\fi0.02 from the intensity of magnetic diffuse scattering confirms the XY-like SG state of NMTO. INS results show quasielastic neutron scattering (QENS) profiles below TSG. The lifetime of dynamic correlations \ensuremathτ\ensuremath∼\ensuremathℏ/\mathrm\ensuremathΓL, obtained from the half-width at half-maximum of the Lorentzian (\mathrm\ensuremathΓL) QENS profiles, are approximately (16\ifmmode±\else\textpm\fi1) and (16\ifmmode±\else\textpm\fi2) ps at 10 K for two positions (0.00, 0.00, 1.52) and (0.01, 0.01, 1.50), respectively. Therefore, our experimental findings demonstrate that short-range-ordered antiferromagnetic clusters with short-lived spin correlations are present in the XY-like SG state of NMTO.