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Magnetic and structural instabilities in CePd2Al2 and LaPd2Al2

✍ Scribed by L.C. Chapon; E.A. Goremychkin; R. Osborn; B.D. Rainford; S. Short

Publisher: Elsevier Science
Year: 2006
Tongue: English
Weight: 161 KB
Volume: 378-380
Category: Article
ISSN: 0921-4526
DOI: 10.1016/j.physb.2006.01.300

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✦ Synopsis

We have investigated the crystal and magnetic structure of the RPd 2 Al 2 compounds (R ¼ La, Ce) by neutron powder diffraction (ND) and inelastic neutron scattering (INS). The ND study shows that both compounds undergo a structural phase transition from tetragonal to orthorhombic symmetry at 91.5 K (La) and 13.5 K (Ce). In the case of CePd 2 Al 2 the crystal field excitation spectrum, which has an extra peak that cannot be explained by a standard crystal field model, indicates the presence of strong magneto-elastic coupling.

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