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Physical review B
We present thermal expansion and magnetostriction measurements on a CeCu2Si2 single crystal of A/S-type up to 17.9T magnetic field applied along the crystallographic a-direction (Delta L ll a ll H) and down to 0.015K temperature. We identify clear thermodynamic anomalies at the superconducting transition T_c and at two second order transitions T_A,B into ordered phases A and B. Our measurements establish for the first time the boundary of phase B at high field and low temperature. No evidencedoi:10.1103/physrevb.98.085115 fatcat:tcyswqfisbhxzdwpvedisxzozm