Abstract
We report a polarized neutron-scattering study of the orbital-like magnetic order in strongly underdoped and . Their hole-doping levels are located on both sides of the critical doping of a metal-insulator transition inferred from transport measurements. Our study reveals a drop down of the orbital-like order slightly below with a steep decrease of both the ordering temperature and the ordered moment. Above , substitution of quantum impurities does not change , whereas it lowers significantly the bulk ordered moment. The modifications of the orbital-like magnetic order are interpreted in terms of a competition with electronic liquid crystal phases around . This competition gives rise to a mixed magnetic state in and a phase separation in .
- Received 1 December 2010
DOI:https://doi.org/10.1103/PhysRevB.83.104504
©2011 American Physical Society