Neutron Powder Diffraction Study on the Magnetic Structure of NdPd 5 Al 2
The magnetic structure of NdPd5Al2 has been studied by neutron powder diffraction. Here, we observed the magnetic reflections with the modulation vector q=(1/2,0,0)q=(1/2,0,0) below the ordering temperature TN. We also found a collinear magnetic structure with a Nd moment of 2.7(3) μB at 0.5 K parallel to the c-axis, where the ferromagnetically ordered a-planes stack with a four-Nd-layer period having a ++-- sequence along the a-direction with the distance between adjacent Nd layers equal to a/2 (magnetic space group Panma). This “stripe”-like modulation is very similar to that in CePd5Al2 with q=(0.235,0.235,0)q=(0.235,0.235,0) with the Ce moment parallel to the c-axis. These structures with in-plane modulation are a consequence of the two-dimensional nature of the Fermi surface topology in this family, originating from the unique crystal structure with a very long tetragonal unit cell and a large distance of >7 Å between the rare-earth layers separated by two Pd and one Al layers.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1376581
- Journal Information:
- Journal of the Physical Society of Japan, Vol. 86, Issue 3; ISSN 0031-9015
- Publisher:
- Physical Society of JapanCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Sinusoidally modulated magnetic structure of Kramers local moments in CePd 5 Al 2
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journal | January 2019 |
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