  SmB6 is a candidate topological Kondo insulator that displays surface
conduction at low temperatures. Here, we perform torque magnetization
measurements as a means to detect de Haas-van Alphen (dHvA) oscillations in
SmB6 crystals grown by aluminum flux. We find that dHvA oscillations occur in
single crystals containing embedded aluminum, originating from the flux used to
synthesize SmB6. Measurements on a sample with multiple, unconnected aluminum
inclusions show that aluminum crystallizes in a preferred orientation within
the SmB6 cubic lattice. The presence of aluminum is confirmed through bulk
susceptibility measurements, but does not show a signature in transport
measurements.
