31P NMR study of Na2CuP2O7: an S = 1/2 two dimensional Heisenberg antiferromagnetic system

R. Nath, A. V. Mahajan, N. Büttgen, Christian Kegler, J. Hemberger, A. Loidl

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    The magnetic properties of Na2CuP2O7 were investigated by means of P-31 nuclear magnetic resonance (NMR), magnetic susceptibility, and heat capacity measurements. We report the 31P NMR shift, the spin-lattice (1/T-1), and spin spin (1/T-2) relaxation rate data as a function of temperature T. The temperature dependence of the NMR shift K(T) is well described by the S = 1/2 square lattice Heisenberg antiferromagnetic model with an intraplanar exchange of J/k(B) similar or equal to 18 +/- 2 K and a hyperfine coupling A = 3533 +/- 185 Oe/mu B. The P-31 NMR spectrum was found to broaden abruptly below T similar to 10 K, signifying some kind of transition. However, no anomaly was noticed in the bulk susceptibility data down to 1.8 K. The heat capacity appears to have a weak maximum around 10 K. With decrease in temperature, the spin-lattice relaxation rate 1/T-1 decreases monotonically and appears to agree well with the high temperature series expansion expression for a S = 1/2 2D square lattice.

    Original languageEnglish
    Pages (from-to)4285-4294
    Number of pages10
    JournalJournal of Physics: Condensed Matter
    Volume18
    DOIs
    Publication statusPublished - 2006

    Keywords

    • NUCLEAR MAGNETIC-RELAXATION
    • QUANTUM ANTIFERROMAGNETS
    • GROUND-STATES
    • SUSCEPTIBILITY
    • LA2CUO4
    • KCUF3

    Cite this

    31P NMR study of Na2CuP2O7: an S = 1/2 two dimensional Heisenberg antiferromagnetic system. / Nath, R.; Mahajan, A. V.; Büttgen, N.; Kegler, Christian; Hemberger, J.; Loidl, A.

    In: Journal of Physics: Condensed Matter, Vol. 18, 2006, p. 4285-4294.

    Research output: Contribution to journalArticle

    Nath, R. ; Mahajan, A. V. ; Büttgen, N. ; Kegler, Christian ; Hemberger, J. ; Loidl, A. / 31P NMR study of Na2CuP2O7: an S = 1/2 two dimensional Heisenberg antiferromagnetic system. In: Journal of Physics: Condensed Matter. 2006 ; Vol. 18. pp. 4285-4294.
    @article{d403d3c49e4448e1a30177c4c37a9067,
    title = "31P NMR study of Na2CuP2O7: an S = 1/2 two dimensional Heisenberg antiferromagnetic system",
    abstract = "The magnetic properties of Na2CuP2O7 were investigated by means of P-31 nuclear magnetic resonance (NMR), magnetic susceptibility, and heat capacity measurements. We report the 31P NMR shift, the spin-lattice (1/T-1), and spin spin (1/T-2) relaxation rate data as a function of temperature T. The temperature dependence of the NMR shift K(T) is well described by the S = 1/2 square lattice Heisenberg antiferromagnetic model with an intraplanar exchange of J/k(B) similar or equal to 18 +/- 2 K and a hyperfine coupling A = 3533 +/- 185 Oe/mu B. The P-31 NMR spectrum was found to broaden abruptly below T similar to 10 K, signifying some kind of transition. However, no anomaly was noticed in the bulk susceptibility data down to 1.8 K. The heat capacity appears to have a weak maximum around 10 K. With decrease in temperature, the spin-lattice relaxation rate 1/T-1 decreases monotonically and appears to agree well with the high temperature series expansion expression for a S = 1/2 2D square lattice.",
    keywords = "NUCLEAR MAGNETIC-RELAXATION, QUANTUM ANTIFERROMAGNETS, GROUND-STATES, SUSCEPTIBILITY, LA2CUO4, KCUF3",
    author = "R. Nath and Mahajan, {A. V.} and N. B{\"u}ttgen and Christian Kegler and J. Hemberger and A. Loidl",
    year = "2006",
    doi = "10.1088/0953-8984/18/17/015",
    language = "English",
    volume = "18",
    pages = "4285--4294",
    journal = "Journal of Physics: Condensed Matter",
    issn = "0953-8984",
    publisher = "IOP Publishing Ltd.",

    }

    TY - JOUR

    T1 - 31P NMR study of Na2CuP2O7: an S = 1/2 two dimensional Heisenberg antiferromagnetic system

    AU - Nath, R.

    AU - Mahajan, A. V.

    AU - Büttgen, N.

    AU - Kegler, Christian

    AU - Hemberger, J.

    AU - Loidl, A.

    PY - 2006

    Y1 - 2006

    N2 - The magnetic properties of Na2CuP2O7 were investigated by means of P-31 nuclear magnetic resonance (NMR), magnetic susceptibility, and heat capacity measurements. We report the 31P NMR shift, the spin-lattice (1/T-1), and spin spin (1/T-2) relaxation rate data as a function of temperature T. The temperature dependence of the NMR shift K(T) is well described by the S = 1/2 square lattice Heisenberg antiferromagnetic model with an intraplanar exchange of J/k(B) similar or equal to 18 +/- 2 K and a hyperfine coupling A = 3533 +/- 185 Oe/mu B. The P-31 NMR spectrum was found to broaden abruptly below T similar to 10 K, signifying some kind of transition. However, no anomaly was noticed in the bulk susceptibility data down to 1.8 K. The heat capacity appears to have a weak maximum around 10 K. With decrease in temperature, the spin-lattice relaxation rate 1/T-1 decreases monotonically and appears to agree well with the high temperature series expansion expression for a S = 1/2 2D square lattice.

    AB - The magnetic properties of Na2CuP2O7 were investigated by means of P-31 nuclear magnetic resonance (NMR), magnetic susceptibility, and heat capacity measurements. We report the 31P NMR shift, the spin-lattice (1/T-1), and spin spin (1/T-2) relaxation rate data as a function of temperature T. The temperature dependence of the NMR shift K(T) is well described by the S = 1/2 square lattice Heisenberg antiferromagnetic model with an intraplanar exchange of J/k(B) similar or equal to 18 +/- 2 K and a hyperfine coupling A = 3533 +/- 185 Oe/mu B. The P-31 NMR spectrum was found to broaden abruptly below T similar to 10 K, signifying some kind of transition. However, no anomaly was noticed in the bulk susceptibility data down to 1.8 K. The heat capacity appears to have a weak maximum around 10 K. With decrease in temperature, the spin-lattice relaxation rate 1/T-1 decreases monotonically and appears to agree well with the high temperature series expansion expression for a S = 1/2 2D square lattice.

    KW - NUCLEAR MAGNETIC-RELAXATION

    KW - QUANTUM ANTIFERROMAGNETS

    KW - GROUND-STATES

    KW - SUSCEPTIBILITY

    KW - LA2CUO4

    KW - KCUF3

    U2 - 10.1088/0953-8984/18/17/015

    DO - 10.1088/0953-8984/18/17/015

    M3 - Article

    VL - 18

    SP - 4285

    EP - 4294

    JO - Journal of Physics: Condensed Matter

    JF - Journal of Physics: Condensed Matter

    SN - 0953-8984

    ER -