Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C

K.N. Toft, A.B. Abrahamsen, M.R. Eskildsen, K. Lefmann, N.H. Andersen, P. Vorderwisch, P. Smeibidl, M. Meissner, P.C. Canfield

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We present a (B,T)-phase diagram of the magnetic superconductor TmNi2B2C obtained by neutron scattering. The measurements were performed in magnetic fields up to 6 T applied along the crystalline a axis. The observed phases are characterized by three ordering vectors, Q(F)=(0.094,0.094,0),Q(AI)=(0.483,0,0), and Q(AII)=(0.496,0,0), all with the magnetic moment along the c axis. In zero and low fields the Tm 4f-moments order in a long wavelength transverse spin density wave with Q=Q(F). The magnetic Q(AI) structure is stabilized by an applied field of 1 T and a transition to Q(AII) is observed at 4 T. For both transitions there is a broad temperature and field range of overlap between the different states. Surprisingly, we observe that the Q(A) phases persist to increasingly higher temperatures when the field is increased. Doping with Yb has been introduced to partly suppress superconductivity. In (Tm0.90Yb0.10)Ni2B2C the Q(F)-->Q(AI) phase transition is also observed but at a larger transition field compared to the undoped compound. In (Tm0.85Yb0.15)Ni2B2C the Q(F) phase persists up to at least 1.8 T. The magnetic correlation length of the Q(AI) phase in TmNi2B2C measured parallel and perpendicular to the magnetic field, is constant within 10% at all fields and temperatures.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume69
    Issue number21
    Pages (from-to)214507
    Number of pages8
    ISSN0163-1829
    DOIs
    Publication statusPublished - 2004

    Cite this

    Toft, K. N., Abrahamsen, A. B., Eskildsen, M. R., Lefmann, K., Andersen, N. H., Vorderwisch, P., ... Canfield, P. C. (2004). Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C. Physical Review B Condensed Matter, 69(21), 214507. https://doi.org/10.1103/PhysRevB.69.214507
    Toft, K.N. ; Abrahamsen, A.B. ; Eskildsen, M.R. ; Lefmann, K. ; Andersen, N.H. ; Vorderwisch, P. ; Smeibidl, P. ; Meissner, M. ; Canfield, P.C. / Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C. In: Physical Review B Condensed Matter. 2004 ; Vol. 69, No. 21. pp. 214507.
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    title = "Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C",
    abstract = "We present a (B,T)-phase diagram of the magnetic superconductor TmNi2B2C obtained by neutron scattering. The measurements were performed in magnetic fields up to 6 T applied along the crystalline a axis. The observed phases are characterized by three ordering vectors, Q(F)=(0.094,0.094,0),Q(AI)=(0.483,0,0), and Q(AII)=(0.496,0,0), all with the magnetic moment along the c axis. In zero and low fields the Tm 4f-moments order in a long wavelength transverse spin density wave with Q=Q(F). The magnetic Q(AI) structure is stabilized by an applied field of 1 T and a transition to Q(AII) is observed at 4 T. For both transitions there is a broad temperature and field range of overlap between the different states. Surprisingly, we observe that the Q(A) phases persist to increasingly higher temperatures when the field is increased. Doping with Yb has been introduced to partly suppress superconductivity. In (Tm0.90Yb0.10)Ni2B2C the Q(F)-->Q(AI) phase transition is also observed but at a larger transition field compared to the undoped compound. In (Tm0.85Yb0.15)Ni2B2C the Q(F) phase persists up to at least 1.8 T. The magnetic correlation length of the Q(AI) phase in TmNi2B2C measured parallel and perpendicular to the magnetic field, is constant within 10{\%} at all fields and temperatures.",
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    author = "K.N. Toft and A.B. Abrahamsen and M.R. Eskildsen and K. Lefmann and N.H. Andersen and P. Vorderwisch and P. Smeibidl and M. Meissner and P.C. Canfield",
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    Toft, KN, Abrahamsen, AB, Eskildsen, MR, Lefmann, K, Andersen, NH, Vorderwisch, P, Smeibidl, P, Meissner, M & Canfield, PC 2004, 'Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C', Physical Review B Condensed Matter, vol. 69, no. 21, pp. 214507. https://doi.org/10.1103/PhysRevB.69.214507

    Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C. / Toft, K.N.; Abrahamsen, A.B.; Eskildsen, M.R.; Lefmann, K.; Andersen, N.H.; Vorderwisch, P.; Smeibidl, P.; Meissner, M.; Canfield, P.C.

    In: Physical Review B Condensed Matter, Vol. 69, No. 21, 2004, p. 214507.

    Research output: Contribution to journalJournal articleResearchpeer-review

    TY - JOUR

    T1 - Neutron diffraction study of anomalous high-field magnetic phases in TmNi2B2C

    AU - Toft, K.N.

    AU - Abrahamsen, A.B.

    AU - Eskildsen, M.R.

    AU - Lefmann, K.

    AU - Andersen, N.H.

    AU - Vorderwisch, P.

    AU - Smeibidl, P.

    AU - Meissner, M.

    AU - Canfield, P.C.

    PY - 2004

    Y1 - 2004

    N2 - We present a (B,T)-phase diagram of the magnetic superconductor TmNi2B2C obtained by neutron scattering. The measurements were performed in magnetic fields up to 6 T applied along the crystalline a axis. The observed phases are characterized by three ordering vectors, Q(F)=(0.094,0.094,0),Q(AI)=(0.483,0,0), and Q(AII)=(0.496,0,0), all with the magnetic moment along the c axis. In zero and low fields the Tm 4f-moments order in a long wavelength transverse spin density wave with Q=Q(F). The magnetic Q(AI) structure is stabilized by an applied field of 1 T and a transition to Q(AII) is observed at 4 T. For both transitions there is a broad temperature and field range of overlap between the different states. Surprisingly, we observe that the Q(A) phases persist to increasingly higher temperatures when the field is increased. Doping with Yb has been introduced to partly suppress superconductivity. In (Tm0.90Yb0.10)Ni2B2C the Q(F)-->Q(AI) phase transition is also observed but at a larger transition field compared to the undoped compound. In (Tm0.85Yb0.15)Ni2B2C the Q(F) phase persists up to at least 1.8 T. The magnetic correlation length of the Q(AI) phase in TmNi2B2C measured parallel and perpendicular to the magnetic field, is constant within 10% at all fields and temperatures.

    AB - We present a (B,T)-phase diagram of the magnetic superconductor TmNi2B2C obtained by neutron scattering. The measurements were performed in magnetic fields up to 6 T applied along the crystalline a axis. The observed phases are characterized by three ordering vectors, Q(F)=(0.094,0.094,0),Q(AI)=(0.483,0,0), and Q(AII)=(0.496,0,0), all with the magnetic moment along the c axis. In zero and low fields the Tm 4f-moments order in a long wavelength transverse spin density wave with Q=Q(F). The magnetic Q(AI) structure is stabilized by an applied field of 1 T and a transition to Q(AII) is observed at 4 T. For both transitions there is a broad temperature and field range of overlap between the different states. Surprisingly, we observe that the Q(A) phases persist to increasingly higher temperatures when the field is increased. Doping with Yb has been introduced to partly suppress superconductivity. In (Tm0.90Yb0.10)Ni2B2C the Q(F)-->Q(AI) phase transition is also observed but at a larger transition field compared to the undoped compound. In (Tm0.85Yb0.15)Ni2B2C the Q(F) phase persists up to at least 1.8 T. The magnetic correlation length of the Q(AI) phase in TmNi2B2C measured parallel and perpendicular to the magnetic field, is constant within 10% at all fields and temperatures.

    KW - 5-I nano

    U2 - 10.1103/PhysRevB.69.214507

    DO - 10.1103/PhysRevB.69.214507

    M3 - Journal article

    VL - 69

    SP - 214507

    JO - Physical Review B (Condensed Matter and Materials Physics)

    JF - Physical Review B (Condensed Matter and Materials Physics)

    SN - 1098-0121

    IS - 21

    ER -