Specific Heat Study of an S=1/2 Alternating Heisenberg Chain System F_5PNN Under Magnetic Field

Abstract

We have measured the specific heat of an S=1/2 antiferromagnetic alternating Heisenberg chain pentafulorophenyl nitronyl nitroxide under magnetic fields up to H>H_C2. This compound has the field-induced magnetic ordered (FIMO) phase between H_C1 and H_C2. Characteristic behaviors are observed depending on the magnetic field up to above H_C2 outside of the H-T boundary for the FIMO. Temperature and field dependence of the specific heat are qualitatively in good agreement with the theoretical calculation on an S=1/2 two-leg ladder. [Wang et al. Phys. Rev. Lett 84 5399 (2000)] This agreement suggests that the observed behaviors are related with the low-energy excitation in the Tomonaga-Luttinger liquid.

4pages, 4figures, replaced with revised version accepted to Physical Review Letters

References in corpus (6)

• NMR study of the S=1/2 Heisenberg Ladder Cu2(C5H12N2)2Cl4 : Quantum phase transition and critical dynamics
• Spin gap in the Quasi-One-Dimensional S=1/2 Antiferromagnet: Cu2(1,4-diazacycloheptane)2Cl4
• Magnetic field effects on two-leg Heisenberg antiferromagnetic ladders: Thermodynamic properties
• Specific Heat Study of the Field-Induced Magnetic Ordering in the Spin Gap System TlCuCl${}_3$
• Specific heat of an S=1/2 Heisenberg ladder compound Cu${}_2$(C${}_5$H${}_{12}$N${}_2$)${}_2$Cl${}_4$ under magnetic fields
• Thermodynamic Properties of the Spin-1/2 Antiferromagnetic ladder Cu2(C2H12N2)2Cl4 under Magnetic Field

Cited by in corpus (8)

• Thermodynamics of the Spin Luttinger-Liquid in a Model Ladder Material
• Phonon-modulated magnetic interactions and spin Tomonaga-Luttinger liquid in the p-orbital antiferromagnet CsO2
• Tomonaga-Luttinger Liquid in a Quasi-One-Dimensional S=1 Antiferromagnet Observed by the Specific Heat
• Specific Heat Study on a Novel Spin-Gapped System : (CH_3)_2NH_2CuCl_3
• Finite-temperature scaling of spin correlations in a partially magnetized Heisenberg $S=1/2$ chain
• Edge singularities in high-energy spectra of gapped one-dimensional magnets in strong magnetic fields
• Possibility of field-induced incommensurate order in quasi-one-dimensional frustrated spin system
• Phase Diagram and Soliton Picture of an Ideal Spin-Peierls Compound D-F${}_5$PNN