Magnetic structure of alloys

✍ Scribed by T. Hori; H. Shiraishi; K. Ohoyama; M. Nishi; K. Koyama; K. Watanabe

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 202 KB
• Volume: 385-386
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2006.05.030

✦ Synopsis

We have made magnetization measurements and neutron diffraction experiments on Y 1Àx Nd x Mn 6 Sn 6 alloys ð0pxp0:5Þ with hp13type structure. The alloy with x ¼ 0:2 shows a hexagonal structure with the lattice constants of a ¼ 5:515 Å and c ¼ 8:990 Å and a helical antiferromagnetic structure with propagation vector q ¼ ð0; 0; 1 6 Þ under a magnetic field H ¼ 0 at 10 K. The helical magnetic arrangement is easily destroyed by applied magnetic field, and becomes finally, a simple ferromagnetic arrangement in a field of 5.5 T. The alloy with x ¼ 0:4 shows a simple ferromagnetic structure even H ¼ 0 at 10 K. It is likely that the magnetic moments of Mn and Nd atoms are 2:3 m B =Mn atom and 3:2 m B =Nd atom, lay in the c-plane, and keep a constant values at 10 K in the whole composition ð0oxp0:5Þ.