Reinvestigation of long-range magnetic ordering in icosahedral Tb-Mg-Zn

Thumbnail Image
Islam, Z.
Fisher, I. R.
Zarestky, J.
Stassis, C.
Major Professor
Committee Member
Journal Title
Journal ISSN
Volume Title
American Physical Society
Canfield, Paul
Distinguished Professor
Goldman, Alan
Distinguished Professor
Research Projects
Organizational Units
Organizational Unit
Physics and Astronomy
Physics and astronomy are basic natural sciences which attempt to describe and provide an understanding of both our world and our universe. Physics serves as the underpinning of many different disciplines including the other natural sciences and technological areas.
Organizational Unit
Ames National Laboratory

Ames National Laboratory is a government-owned, contractor-operated national laboratory of the U.S. Department of Energy (DOE), operated by and located on the campus of Iowa State University in Ames, Iowa.

For more than 70 years, the Ames National Laboratory has successfully partnered with Iowa State University, and is unique among the 17 DOE laboratories in that it is physically located on the campus of a major research university. Many of the scientists and administrators at the Laboratory also hold faculty positions at the University and the Laboratory has access to both undergraduate and graduate student talent.

Journal Issue
Is Version Of
We present results of a study of possible magnetic ordering in the icosahedral phase of Tb-Mg-Zn probed by bulk magnetization measurements and neutron diffraction. Measurements on both crushed single grains and cast polycrystalline samples of To-Mg-Zn were performed. Magnetization measurements on both samples reveal only a spin-glass-like transition at approximately 5.8 g. Neutron diffraction from the crushed single grains reveals only short-range magnetic ordering at low temperatures, with no evidence of the long-range magnetic ordering reported previously [Charrier, Ouladdiaf, and Schmitt Phys. Rev. Lett. 78, 4637 (1997)]. Likewise, the cast polycrystalline samples exhibit primarily diffuse magnetic scattering at low temperature, but at least one relatively sharp diffraction peak was observed. Our results indicate that for single grain samples there is no long-range magnetic ordering and that, at best, the magnetic ordering in these quasicrystalline alloys is not very robust.
This article is published as Islam, Z., I. R. Fisher, J. Zarestky, P. C. Canfield, C. Stassis, and A. I. Goldman. "Reinvestigation of long-range magnetic ordering in icosahedral Tb-Mg-Zn." Physical Review B 57, no. 18 (1998): R11047. DOI: 10.1103/PhysRevB.57.R11047. Copyright 1998 American Physical Society. Posted with permission.