Spin-specific heat determination of the ratio of competing first- and second-neighbor exchange interactions in frustrated spin-1/2 chains
Author(s): Dey, Dayasindhu; Kumar, Manoranjan; Dutton, SiΓ’n E; Cava, Robert J; Soos, ZoltΓ‘n G
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Abstract: | The magnetic susceptibility πβ‘(π) of spin- 1 2 chains is widely used to quantify exchange interactions, even though πβ‘(π) is similar for different combinations of ferromagnetic π½1 between first neighbors and antiferromagnetic π½2 between second neighbors. We point out that the spin-specific heat πΆβ‘(π) directly determines the ratio πΌ=π½2/|π½1| of competing interactions. The π½1βπ½2 model is used to fit the isothermal magnetization πβ‘(π,π») and πΆβ‘(π,π») of spin- 1/2 Cu(II) chains in LiCuSbO4. By fixing πΌ,πΆβ‘(π) resolves the offsetting π½1,πΌ combinations obtained from πβ‘(π,π») in cuprates with frustrated spin chains. |
Publication Date: | 12-Feb-2018 |
Electronic Publication Date: | 12-Feb-2018 |
Citation: | Dey, Dayasindhu, Kumar, Manoranjan, Dutton, SiΓ’n E, Cava, Robert J, Soos, ZoltΓ‘n G. Spin-specific heat determination of the ratio of competing first- and second-neighbor exchange interactions in frustrated spin-1/2 chains. Physical Review B, 97 (6), 10.1103/physrevb.97.064407 |
DOI: | doi:10.1103/physrevb.97.064407 |
ISSN: | 2469-9950 |
EISSN: | 2469-9969 |
Language: | en |
Type of Material: | Journal Article |
Journal/Proceeding Title: | Physical Review B |
Version: | Author's manuscript |
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