Relationship of magnetic ordering and crystal structure in the ferromagnet Tm at high pressures
The ferromagnetism of lanthanoid metals is modified when the crystal structure changes. All 4f lanthanide ferromagnets, from Gd to Tm, have an hcp structure at ambient pressure, and exhibit the structural transformations in the sequence hcp -> Sm-type -> double-hcp (dhcp) -> fcc -> trigonal under pressure. Recently we have also performed high sensitivity a.c. magnetization experiments for Er and Tm. It is noted that Er has both incommensurate (HM) and FM orders at least 30 GPa, whereas Tm has the disappearance of a.c. magnetization anomaly due to the HM ordering near the hcp-Sm structural transition. The experimental results suggest that the HM order is more stable than the FM one for Tb, and Ho, whereas in Tm, the FM is more stable than the HM order. This may be an general difference between light 4f lanthanide FM elements (Tb-Ho) and heavy one (T m) There has been no neutron diffraction data for Tm at high pressures so far. In order to seed light in this discrepancy between Tb-Ho and Tm, we propose to perform neutron powder diffraction experiments in Tm at high pressures (P < 150Kbar) To accomplish the experiment, we apply for 3 beamtime days at the D20 (or D1B)instrument.
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The recommended format for citing this dataset in a research publication is in the following format:
J Campo; AURELIO Gabriela; KOSAKA Yusuke; Masaki Mito; Miguel Pardo-Sainz; PUENTE ORENCH Ines; RODRIGUEZ VELAMAZAN Jose Alberto and Francisco Rubio. (2023). Relationship of magnetic ordering and crystal structure in the ferromagnet Tm at high pressures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2947
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