Fig. 3

Observed versus calculated neutron polarization matrix elements for the different poling conditions. The error bars of the observed terms are of the size of the markers. a 10 full matrices measured after cooling under E field of 8 kV cm⁻¹ along b and H field of 0.7 T along a (negative conjugate E x H field of -5.6 T kV cm⁻¹ along c). b 5 full matrices measured after cooling under E field of 8 kV cm⁻¹ along b and H field of -0.7 T along a (positive conjugate E x H field of 5.6 T kV cm⁻¹ along c). c 5 full matrices measured after cooling under E field of 8 kV cm⁻¹ and H field of 0.7 T, both along b (zero conjugate E x H field). d 8 full matrices measured after cooling under E field of 1.5 kV cm⁻¹ along b and H field of 0.7 T along a (negative conjugate E x H field of -1.05 T kV cm⁻¹ along c). For the calculations, the crystal and magnetic structure models from ref.¹² were used, allowing to vary the magnetic domain population and the modulus of the magnetic moment, with the final values of the fit given in the figures.