Magnetoelastic tetragonal-to-orthorhombic distortion inErNi2B2C

C. Detlefs, A. H. M. Z. Islam, T. Gu, A. I. Goldman, C. Stassis, P. C. Canfield, J. P. Hill, T. Vogt
1997 Physical Review B (Condensed Matter)  
We have performed synchrotron x-ray scattering experiments on single crystals of ErNi 2 B 2 C. Below 6.3 K, the (2,0,0) Bragg peak splits, indicating a tetragonal-to-orthorhombic distortion. The mismatch between the a and b lattice parameters appears coincident with the onset of long-range antiferromagnetic order and increases continuously with decreasing temperature, reaching a value of a/bϪ1Ϸ0.2% at 3.7 K.
doi:10.1103/physrevb.56.7843 fatcat:lk52ixcpt5ak3n4z6iqrpihrzu