Phys. Rev. Lett. 100, 147201 (2008) [4 pages]Easy-Axis Kagome Antiferromagnet: Local-Probe Study of Nd3Ga5SiO14Received 14 December 2007; revised 1 February 2008; published 8 April 2008 We report a local-probe investigation of the magnetically anisotropic kagome compound Nd3Ga5SiO14. Our zero-field muon spin relaxation (μSR) results provide direct evidence of a fluctuating collective paramagnetic state down to 60 mK, supported by a wipeout of the Ga nuclear magnetic resonance (NMR) signal below 25 K. At 60 mK a dynamics crossover to a much more static state is observed by μSR in magnetic fields above 0.5 T. Accordingly, the NMR signal is recovered at low T above a threshold field, revealing a rapid temperature and field variation of the magnetic fluctuations. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.147201
DOI:
10.1103/PhysRevLett.100.147201
PACS:
75.10.Hk, 71.27.+a, 75.30.Gw
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