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Title Competition between magnetism and superconductivity in tmni2b2c observed by muon-spin rotation
 
Names COOKE, DW (author)
SMITH, JL (author)
BLUNDELL, SJ (author)
CHOW, KH (author)
PATTENDEN, PA (author)
PRATT, FL (author)
COX, SFJ (author)
BROWN, SR (author)
MORROBELSOSA, A (author)
LICHTI, RL (author)
GUPTA, LC (author)
NAGARAJAN, R (author)
HOSSAIN, Z (author)
MAZUMDAR, C (author)
GODART, C (author)
Date Issued 1995 (iso8601)
Abstract We report muon-spin-rotation measurements of the internal field in the rare-earth nickel boride carbide superconductor TmNi2B2C from 100 mK up to well above the superconducting transition temperature (T-c=9.5 K). An oscillatory muon response indicates that the muon is affected by a quasistatic local field that follows a T-1 dependence over a wide temperature range and without interruption at the superconducting transition. The corresponding relaxation rate remains constant in the normal state, but begins to rise very sharply with decreasing temperature below T-c scaling approximately with the local field down to its maximum at 2.5 K. The quasistatic internal field may be attributed to a spiral structure or dow three-dimensional correlations of the Tm moments. Decoupling experiments reveal a dynamic depolarization mechanism which may tentatively be ascribed to fast two-dimensional correlations of the Ni moments, slowed by the onset of superconductivity.
Genre Note
Identifier 0163-1829
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