Magnetic field dependence of muon spin relaxation in geometrically frustrated Gd2 Ti2 O7

S. R. Dunsiger, R. F. Kiefl, J. A. Chakhalian, J. E. Greedan, W. A. MacFarlane, R. I. Miller, G. D. Morris, A. N. Price, N. P. Raju, J. E. Sonier

Research output: Contribution to journalArticle

28 Scopus citations

Abstract

Muon spin relaxation has been investigated in the geometrically frustrated antiferromagnet Gd2 Ti2 O7 as a function of magnetic field and temperature. Well above the magnetic ordering temperature of Tc =1 K, the field dependence of the muon spin relaxation rate (T1 -1) originates from field-induced changes in the spectral density of Gd fluctuations. This allows one to determine both the autocorrelation time and magnitude of the fluctuating local magnetic field at the muon. Well below Tc a coherent precession signal is observed, corresponding to a much smaller quasistatic local magnetic field. At low temperatures T1 -1 levels off, at a constant value which is much larger than reported recently for a single crystal of Gd2 Ti2 O7. A magnetic field of 2 T completely quenches the low-temperature spin relaxation in the present sample. These results indicate that the ordered state is characterized by low-frequency dynamics which are most likely due to residual crystalline disorder.

Original languageEnglish (US)
Article number172418
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume73
Issue number17
DOIs
StatePublished - Jun 7 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Magnetic field dependence of muon spin relaxation in geometrically frustrated Gd2 Ti2 O7'. Together they form a unique fingerprint.

  • Cite this

    Dunsiger, S. R., Kiefl, R. F., Chakhalian, J. A., Greedan, J. E., MacFarlane, W. A., Miller, R. I., Morris, G. D., Price, A. N., Raju, N. P., & Sonier, J. E. (2006). Magnetic field dependence of muon spin relaxation in geometrically frustrated Gd2 Ti2 O7. Physical Review B - Condensed Matter and Materials Physics, 73(17), [172418]. https://doi.org/10.1103/PhysRevB.73.172418