Spin-specific heat determination of the ratio of competing first- and second-neighbor exchange interactions in frustrated spin- 12 chains

Dayasindhu Dey, Manoranjan Kumar, Siân E. Dutton, Robert J. Cava, Zoltán G. Soos

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The magnetic susceptibility χ(T) of spin-12 chains is widely used to quantify exchange interactions, even though χ(T) is similar for different combinations of ferromagnetic J1 between first neighbors and antiferromagnetic J2 between second neighbors. We point out that the spin-specific heat C(T) directly determines the ratio α=J2/|J1| of competing interactions. The J1-J2 model is used to fit the isothermal magnetization M(T,H) and C(T,H) of spin-12 Cu(II) chains in LiCuSbO4. By fixing α,C(T) resolves the offsetting J1,α combinations obtained from M(T,H) in cuprates with frustrated spin chains.

Original languageEnglish (US)
JournalPhysical Review B
Volume97
Issue number6
DOIs
StatePublished - Feb 12 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Spin-specific heat determination of the ratio of competing first- and second-neighbor exchange interactions in frustrated spin- 12 chains'. Together they form a unique fingerprint.

  • Cite this