Magnetostructural transition in NdCu2 |
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| Authors: | S. Kramp M. Doerr M. Rotter M. Loewenhaupt R. v.d. Kamp |
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| Affiliation: | Institut für Angewandte Physik, Technische Universit?t Dresden, 01062 Dresden, Germany, DE
Hahn Meitner Institut, 14109 Berlin, Germany, DE
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| Abstract: | The magnetic (H , T)-phase diagram of the orthorhombic compound NdCu2 was investigated for external magnetic fields up to 15 T parallel to the crystallographic c-direction. Magnetization and magnetostriction measurements reveal an anomalous change of the magnetic properties as well as giant magnetostriction (GMS) and large hysteretic effects. This behaviour is similar to that observed in some other RCu2 compounds where it has been interpreted as a conversion of the magnetic Ising axis. In contrast to these other RCu2 compounds, however, the easy axis of magnetization in NdCu2 is the b-axis. The macroscopic measurements are compared with neutron diffraction experiments which reveal GMS along the b-axis and a new magnetic phase with propagation vector in the converted crystal. Received 27 March 2000 and Received in final form 11 September 2000 |
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| Keywords: | PACS. 71.20.Eh Rare earth metals and alloys - 75.30.Kz Magnetic phase boundaries (including magnetic transitions metamagnetism etc.) - 75.80.+q Magnetomechanical and magnetoelastic effects magnetostriction - 61.12-q Neutron diffraction and scattering |
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