μSR measurements on the vortex lattice of La1.83Sr0.17CuO4

We report μSR measurements of the vortex lattice in the slightly overdoped compound La 2-x Sr x CuO 4 (x = 0.17). The magnetic phase diagram provides an interesting comparison to the more exotic phases observed in the underdoped (x = 0.10) compound. The field induced hexagonal to intrinsic square transition is observed to occur at around 0.4 T in agreement with previous neutron measurements.