Skip to main content
SpringerLink
Log in

μSR studies in the heavy fermion systems UNi2Al3, UPd2Al3 and U2PtC2

  • Session 3. Heavy Fermion systems
  • Published:
Hyperfine Interactions Aims and scope Submit manuscript

Abstract

We have performed Muon Spin Relaxation (μSR) measurements of several heavy fermion systems: UNi2Al3 (single crystal), UPd2Al3 (single crystal) and U2PtC2 (polycrystal). ZF -μSR measurements of UNi2Al3 show magnetic order below the Néel temperatureT N=4.6K, with the muon precession frequencyν(T → 0)=2.5MHz at low temperatures. The local field distribution obtained at low temperatures in UNi2Al3 resembles that of the incommensurate spin density wave (SDW) system (TMTSF)2PF6, suggesting an incommensurate spin arrangement in UNi2Al3. TF -μSR measurements give the penetration depthλ(T → 0)=6100Å for UPd2Al3 andλ(T→ 0)=7000Å for U2PtC2 respectively. Since UPd2Al3 and U2PtC2 are clean superconductors (ζ/l-0), we can combineσ∝ n s/m* with the Sommerfeld constantγ ∝ n 1/3s m* to calculate the Fermi temperatureT F ∝ σ3/4γ−1/4, which represents the characteristic energy scale of the superconducting carriers. We obtainT C/TF ≈ 0.01 for both UPd2Al3 and U2PtC2, comparable to other exotic superconductors, but quite different from simple metal BCS superconductors, whereT C/TF ≤ 0.01.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. A. Schenck, Frontiers in Solid State Sciences, Volume on Magnetism, edited by L. C. Gupta and M. S. Multani, World Scientific Publisher.

  2. Y. J. Uemuraet al., Phys. Rev. B39, 4726 (1989).

    Google Scholar 

  3. C. Broholmet al., Phys. Rev. Lett.65, 2062 (1990).

    Google Scholar 

  4. G. M. Lukeet al., Phys. Lett. A157, 173 (1991).

    Google Scholar 

  5. G. M. Lukeet al., unpublished work.

  6. A. Amatoet al., Z. Phys. B86, 159 (1992).

    Google Scholar 

  7. L. P. Leet al., Europhys. Lett.15 (5), 547 (1991).

    Google Scholar 

  8. A. Schröderet al., preprint.

  9. F. Grosset al., Physica C162–164, 419, (1989).

    Google Scholar 

  10. We obtainζ=94Å,l=1000Å for UPd2Al3 andζ=67Å,l=580Å for U2PtC2 by combining the results of theμSR. relaxation rateσ ∝ n s/m*, the Sommerfeld constantγ ∝ n 1/3s m* and the dc resistivityρ dc=m*/neτ. The measured resistivityρ=3.5μΩcm for UPd2Al3 andρ=10μΩcm for U2PtC2 are used, which represent the lower limits of the scattering timeτ.

  11. C. Geibelet al., Physica C185–189, 2651 (1991).

    Google Scholar 

  12. G. P. Meisneret al., Phys. Rev. Lett.53, 1829 (1984).

    Google Scholar 

  13. Y. J. Uemuraet al., Phys. Rev. Lett.66, 2665 (1991).

    Google Scholar 

  14. Y. J. Uemura and G. M. Luke, Physica B, in press.

Download references

Author information

Authors and Affiliations

  1. Dept. of Physics, Columbia University, 10027, New York, NY, USA

    W. D. Wu, A. Keren, L. P. Le, G. M. Luke, B. J. Sternlieb & Y. J. Uemura

  2. Dept. of Physics, Faculty of Science, Tohoku University, 980, Sendai, Japan

    N. Sato & T. Komatsubara

  3. General Motors NAO Research & Development Center, 48090, Warren, MI, USA

    G. P. Meisner

Authors
  1. W. D. Wu
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. A. Keren
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. L. P. Le
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. G. M. Luke
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. B. J. Sternlieb
    View author publications

    You can also search for this author in PubMed Google Scholar

  6. Y. J. Uemura
    View author publications

    You can also search for this author in PubMed Google Scholar

  7. N. Sato
    View author publications

    You can also search for this author in PubMed Google Scholar

  8. T. Komatsubara
    View author publications

    You can also search for this author in PubMed Google Scholar

  9. G. P. Meisner
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Wu, W.D., Keren, A., Le, L.P. et al. μSR studies in the heavy fermion systems UNi2Al3, UPd2Al3 and U2PtC2 . Hyperfine Interact 85, 425–430 (1994). https://doi.org/10.1007/BF02069454

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02069454

Keywords

Search

Navigation