Nuclear spin relaxation in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 and (BEDT-TTF)4Hg2.89Br8

A. V. Skripov, A. P. Stepanov, I. Heinmaa, A. Vainrub, R. N. Lyubovskaya, M. Z. Aldoshina

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    Abstract

    The behavior of the proton spin-lattice relaxation rate T-1 1 in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 (I) and (BEDT-TTF)4Hg2.89Br8 (II) is studied over the ranges of temperature 4.5≤T≤300 K and resonance frequency 33≤v≤360 MHz. At T<150 K we have found a strong frequency dependence of T-1 1 in II with a maximum between 90 and 200 MHz. This unusual frequency dependence can be explained by cross-relaxation via quadrupolar Br nuclei. The temperature dependence of T-1 1 in both I and II at low temperatures is found to be non-Korringa.

    Original languageEnglish (US)
    Pages (from-to)340-344
    Number of pages5
    JournalPhysica C: Superconductivity and its Applications
    Volume172
    Issue number3-4
    DOIs
    StatePublished - Dec 15 1990

    Fingerprint

    organic superconductors
    nuclear spin
    Superconducting materials
    cross relaxation
    Spin-lattice relaxation
    spin-lattice relaxation
    Temperature
    Protons
    temperature dependence
    nuclei
    protons
    BEDT-TTF
    temperature

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Nuclear spin relaxation in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 and (BEDT-TTF)4Hg2.89Br8 . / Skripov, A. V.; Stepanov, A. P.; Heinmaa, I.; Vainrub, A.; Lyubovskaya, R. N.; Aldoshina, M. Z.

    In: Physica C: Superconductivity and its Applications, Vol. 172, No. 3-4, 15.12.1990, p. 340-344.

    Research output: Contribution to journalArticle

    Skripov, A. V. ; Stepanov, A. P. ; Heinmaa, I. ; Vainrub, A. ; Lyubovskaya, R. N. ; Aldoshina, M. Z. / Nuclear spin relaxation in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 and (BEDT-TTF)4Hg2.89Br8 In: Physica C: Superconductivity and its Applications. 1990 ; Vol. 172, No. 3-4. pp. 340-344.
    @article{d31cabaeb11c43e7b7d7d3e8556ea435,
    title = "Nuclear spin relaxation in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 and (BEDT-TTF)4Hg2.89Br8",
    abstract = "The behavior of the proton spin-lattice relaxation rate T-1 1 in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 (I) and (BEDT-TTF)4Hg2.89Br8 (II) is studied over the ranges of temperature 4.5≤T≤300 K and resonance frequency 33≤v≤360 MHz. At T<150 K we have found a strong frequency dependence of T-1 1 in II with a maximum between 90 and 200 MHz. This unusual frequency dependence can be explained by cross-relaxation via quadrupolar Br nuclei. The temperature dependence of T-1 1 in both I and II at low temperatures is found to be non-Korringa.",
    author = "Skripov, {A. V.} and Stepanov, {A. P.} and I. Heinmaa and A. Vainrub and Lyubovskaya, {R. N.} and Aldoshina, {M. Z.}",
    year = "1990",
    month = "12",
    day = "15",
    doi = "10.1016/0921-4534(90)90626-P",
    language = "English (US)",
    volume = "172",
    pages = "340--344",
    journal = "Physica C: Superconductivity and its Applications",
    issn = "0921-4534",
    publisher = "Elsevier",
    number = "3-4",

    }

    TY - JOUR

    T1 - Nuclear spin relaxation in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 and (BEDT-TTF)4Hg2.89Br8

    AU - Skripov, A. V.

    AU - Stepanov, A. P.

    AU - Heinmaa, I.

    AU - Vainrub, A.

    AU - Lyubovskaya, R. N.

    AU - Aldoshina, M. Z.

    PY - 1990/12/15

    Y1 - 1990/12/15

    N2 - The behavior of the proton spin-lattice relaxation rate T-1 1 in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 (I) and (BEDT-TTF)4Hg2.89Br8 (II) is studied over the ranges of temperature 4.5≤T≤300 K and resonance frequency 33≤v≤360 MHz. At T<150 K we have found a strong frequency dependence of T-1 1 in II with a maximum between 90 and 200 MHz. This unusual frequency dependence can be explained by cross-relaxation via quadrupolar Br nuclei. The temperature dependence of T-1 1 in both I and II at low temperatures is found to be non-Korringa.

    AB - The behavior of the proton spin-lattice relaxation rate T-1 1 in the organic superconductors (BEDT-TTF)4Hg2.78Cl8 (I) and (BEDT-TTF)4Hg2.89Br8 (II) is studied over the ranges of temperature 4.5≤T≤300 K and resonance frequency 33≤v≤360 MHz. At T<150 K we have found a strong frequency dependence of T-1 1 in II with a maximum between 90 and 200 MHz. This unusual frequency dependence can be explained by cross-relaxation via quadrupolar Br nuclei. The temperature dependence of T-1 1 in both I and II at low temperatures is found to be non-Korringa.

    UR - http://www.scopus.com/inward/record.url?scp=0025683772&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0025683772&partnerID=8YFLogxK

    U2 - 10.1016/0921-4534(90)90626-P

    DO - 10.1016/0921-4534(90)90626-P

    M3 - Article

    AN - SCOPUS:0025683772

    VL - 172

    SP - 340

    EP - 344

    JO - Physica C: Superconductivity and its Applications

    JF - Physica C: Superconductivity and its Applications

    SN - 0921-4534

    IS - 3-4

    ER -