Pressure-induced magnetic and valence transition in YbMn2Ge2

✍ Scribed by M Hofmann; S.J Campbell; P Link; I Goncharenko; K Knorr

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 228 KB
• Volume: 350
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2004.03.049

✦ Synopsis

The effect of applied pressure on the valence and magnetic properties of YbMn 2 Ge 2 (tetragonal ThCr 2 Si 2 -type structure; I4/mmm) has been investigated by neutron powder diffraction measurements over the temperature range B1.5-300 K. Concurrent with a strong decrease in unit cell volume (BÀ7%), the magnetic ordering scheme of YbMn 2 Ge 2 is found to change significantly from a predominately planar antiferromagnetic arrangement at ambient temperature and pressure to a collinear antiferromagnetic structure around p B1.5 Gpa.