2017/05/06 by Tanmoy Chakraborty, Harkirat Singh, Dipanjan Chaudhuri +5
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Bethe ansatz #Chemistry #Condensed matter physics #Entropy (arrow of time) #Ferromagnetism #Heisenberg model #Internal energy #Magnetic field #Magnetic susceptibility #Magnetism in coordination complexes #Magnetization #Mathematics #Monte Carlo method #Physics #Quantum #Quantum many-body systems #Quantum mechanics #Specific heat #Spin (aerodynamics) #Statistics #Theoretical and Computational Physics #Thermodynamics #cond-mat.mtrl-sci #cond-mat.stat-mech #cond-mat.str-el #quant-ph
paper · pdf · doi:10.1016/j.jmmm.2017.05.020
published as J. Magn. Magn. Mater. 439, 101-106 (2017)
openalex publication_date 2017/05/06 · arxiv created 2018/12/29 · arxiv updated 2019/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Detailed experimental investigations of thermal and magnetic properties are presented for Cu(NH3)4SO4.H2O, an ideal uniform Heisenberg spin half chain compound. A comparison of these properties with relevant spin models is also presented. The temperature dependent magnetic susceptibility and specific heat data has been compared with the exact solution for uniform Heisenberg chain model derived by means of Bethe ansatz technique. Field dependent isothermal magnetization curves are simulated by Quantum Monte Carlo technique and compared with the corresponding experimental ones. Specific heat as a function of magnetic field (up to 7T) and temperature (down to 2K) is reported. Subsequently, the data are compared with the corresponding theoretical curves for the infinite Heisenberg spin half chain model with J=6K. Moreover, internal energy and entropy are calculated by analyzing the experimental specific heat data. Magnetic field and temperature dependent behavior of entropy and internal energy are in good agreement with the theoretical predictions.