Abstract
We have discovered anew antiferromagnetic phase in TmNi2B2C by neutron diffraction. The ordering vector is Q(A) = (0.48,0,0) and the phase appears shove a critical in-plans magnetic field of 0.9 T. The field was applied in order to test the assumption that the zero-field magnetic structure at Q(F) = (0.094, 0.094, 0) would change into a c-axis ferromagnet if superconductivity were destroyed. We present theoretical calculations which show that two effects are important a suppression of the ferromagnetic component of the RKKY exchange interaction in the superconducting phase and a reduction of the superconducting condensation energy due to the periodic modulation of the moments at Q(A).
Original language | English |
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Journal | Physical Review Letters |
Volume | 84 |
Issue number | 21 |
Pages (from-to) | 4982-4985 |
ISSN | 0031-9007 |
DOIs | |
Publication status | Published - 2000 |