Abstract
We report a muon spin rotation (μSR) study of the magnetic properties of the Cu2+ quasi-one-dimensional CuGeO3 system and its lightly-doped derivative Cu0.97Zn0.03GeO3. Susceptibility measurements on CuGeO3 show a sudden change in the vicinity of 14 K that has been interpreted before as a magnetic transition to a spin-Peierls state. μSR shows no evidence of spin freezing below 14 K, implying that the transition is to a magnetic state with no static (random or ordered) electronic moments. A modest slowing down of the electronic spin dynamics is also identified at this temperature. Similarly, no evidence of a transition to a static magnetic state is found for Cu0.97Zn0.03GeO3 whose susceptibility shows hysteretic behaviour between zero-field and field cooled measurements at 4 K, previously ascribed to spinglass-like behaviour. Given the nature of the muon spin as a local magnetic probe, the present results necessitate a re-interpretation of the origin of the susceptibility anomaly observed in the doped system.
Original language | English |
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Pages (from-to) | 223-226 |
Number of pages | 4 |
Journal | Zeitschrift für Physik B Condensed Matter |
Volume | 96 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1994 Jun |
Externally published | Yes |
Keywords
- 75.90
- 76.75
ASJC Scopus subject areas
- Condensed Matter Physics