Journal
PHYSICAL REVIEW B
Volume 84, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.020410
Keywords
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Funding
- JSPS [21340093]
- MEXT [22014004]
- Grants-in-Aid for Scientific Research [10J10454, 22014004, 21340093] Funding Source: KAKEN
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We report results of V-51 NMR in the field-induced phase of volborthite Cu3V2O7(OH)(2).2H(2)O, a spin-1/2 antiferromagnet on a distorted kagome lattice. In magnetic fields above 4.5 T, two types of V sites with different spin-echo decay rates are observed. The hyperfine field at the fast decaying sites has a distribution, while it is more homogeneous at the slowly decaying sites. Our results indicate a heterogeneous state consisting of two spatially alternating Cu spin systems, one of which exhibits anomalous spin fluctuations contrasting with the other showing a conventional static order.
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