Thermodynamics of the spin-1/2 two-leg ladder compound $(C_5{H}_{12}N{)}_{2}CuB{r}_4$

Abstract

The thermodynamic behavior of the spin $S=1/2$ antiferromagnetic two-leg ladder compound $(C_5{H}_{12}N{)}_{2}CuB{r}_4$ in a uniform magnetic field is studied using numerical and analytical approaches. The entropy $S(H,T)$ and specific heat $C(H,T)$ are calculated. The specific heat shows various behaviors in different regions of the magnetic field. The field-dependence of the specific heat is almost symmetric about the average of quantum critical fields in complete agreement with experimental results. In addition, it is found that during an adiabatic demagnetization process, temperature drops in the vicinity of the field induced zero-temperature quantum phase transitions.

7 pages, 6 figures, Submitted

References in corpus (20)

• Universally diverging Grueneisen parameter and the magnetocaloric effect close to quantum critical points
• Sign change of the Grueneisen parameter and magnetocaloric effect near quantum critical points
• Controlling Luttinger liquid physics in spin ladders under a magnetic field
• Thermodynamics of the Spin Luttinger-Liquid in a Model Ladder Material
• Exact low-temperature behavior of kagome antiferromagnet at high fields
• Magnetocaloric effect in one-dimensional antiferromagnets
• Statics and dynamics of weakly coupled antiferromagnetic spin-1/2 ladders in a magnetic field
• Direct Observation of Magnon Fractionalization in the Quantum Spin Ladder
• Field-Controlled Magnetic Order in the Quantum Spin-Ladder System (Hpip)2CuBr4
• Magnetocaloric effect in the frustrated square lattice J1-J2 model
• Integrable models and quantum spin ladders: comparison between theory and experiment for the strong coupling ladder compounds
• Diverging thermal expansion of the spin-ladder system (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$
• Magnetocaloric effect in quantum spin-s chains
• Magnetocaloric effect in two-dimensional spin-1/2 antiferromagnets
• Anisotropy of Magnetic Interactions in the Spin-Ladder Compound (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$
• Neutron scattering evidence for isolated spin-1/2 ladders in (C${}_5$D${}_{12}$N)${}_2$CuBr${}_4$
• Spin ladders and quantum simulators for Luttinger liquids
• Spin-spin correlations of the spin-ladder compound (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$ measured by magnetostriction and comparison to Quantum Monte Carlo results
• Spinon localization in the heat transport of the spin-1/2 ladder compound (C${}_5$H${}_{12}$N)${}_2$CuBr${}_4$
• Exact results for the thermal and magnetic properties of strong coupling ladder compounds

Cited by in corpus (2)

• Magnetocaloric effect as a signature of quantum level-crossing for a spin-gapped system
• First-order commensurate-incommensurate magnetic phase transition in the coupled FM spin-1/2 two-leg ladders