Bibliographic Details
| Title: |
Hidden order in |
| Authors: |
Bourdarot, F.1, Bombardi, A.2, Burlet, P.1, Enderle, M.3, Flouquet, J.1, Lejay, P.4, Kernavanois, N.3, Mineev, V.P.1, Paolasini, L.2, Zhitomirsky, M.E.1, Fåk, B.1 fak@cea.fr |
| Source: |
Physica B. Apr2005, Vol. 359-361, p986-993. 8p. |
| Subjects: |
Neutron scattering, Superconductors, Phase transitions, Temperature measurements |
| Abstract: |
Abstract: Neutron-scattering and specific-heat measurements of the heavy-fermion superconductor under hydrostatic pressure and with Rh-doping, , show the existence of two magnetic phase transitions. At , a second-order phase transition with strong anomalies in the specific heat and other macroscopic and transport properties are accompanied by an antiferromagnetically ordered dipolar moment of only . At under pressure, , or small Rh doping, a first-order phase transition gives rise to small anomalies in the specific heat and a large ordered moment of , but with the same magnetic structure. The results can be understood in terms of a hidden order parameter , which is linearly coupled to the ordered moment m. It follows that m and have the same symmetry and hence both break time-reversal symmetry. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
