Li non-stoichiometry and crystal growth of untwinned 1D quantum spin system Lix Cu2 O2

Details Li non-stoichiometry and crystal growth of untwinned 1D quantum spin system Lix Cu2 O2 Li non-stoichiometry and crystal growth of untwinned 1D quantum spin system Lix Cu2 O2

2008-11-04

arxiv.org/abs/0811.0447v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.78.212401

Floating-zone growth of untwinned single crystal of Li_xCu_2O_2 with high Li content of x ~ 0.99 is reported. Li content of Li_xCu_2O_2 has been determined accurately through combined iodometric titration and thermogravimetric methods, which also ruled out the speculation of chemical disorder between Li and Cu ions. The morphology and physical properties of single crystals obtained from slowing-cooling (SL) and floating-zone (FZ) methods are compared. The floating-zone growth under Ar/O_2=7:1 gas mixture at 0.64 MPa produces large area of untwinned crystal with highest Li content, which has the lowest helimagnetic ordering temperature ~19K in the Li_xCu_2O_2 system.

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