Magnetic properties of amorphous alloys of Fe with La, Lu, Y, and Zr

Journal Article · Thu Feb 01 04:00:00 EST 1979 · Phys. Rev., Sect. B. Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.19.1623· OSTI ID:6153802

Heiman, N; Kazama, N

In order to study the systematics of the Fe-Fe exchange in amorphous rare-earth--Fe alloys, without the complications associated with the magnetic characteristics of the rare-earth elements, amorphous films of Fe alloyed with La, Lu, Y, and Zr have been prepared with a wide range of Fe concentrations. Magnetization and Moessbauer-effect measurements were made. The magnetic properties of the alloys depended critically on the choice of rare earth (or rare-earth-like element). YFe and LuFe alloys were found to have spin-glass characteristics while LaFe and ZrFe alloys were found to be ferromagnetic, but with evidence that exchange fluctuations were nearly as large as the average exchange. Thus the nature of the Fe-Fe exchange interaction depends critically upon the species of the rare earth. The most important parameter in determining the magnetic behavior of these alloys appears to be the size of the rare-earth atom, with large rare-earth atoms resulting in a smaller ratio of exchange fluctuations to exchange. The same dependence of the magnetic properties upon rare-earth size appears to be important in the case of magnetic-rare-earth atoms; however, the effect of rare-earth--Fe exchange also becomes important and these effects are discussed.

• Research Organization: IBM Research Laboratory, San Jose, California 95193
• OSTI ID: 6153802
• Journal Information: Phys. Rev., Sect. B. Condens. Matter; (United States), Journal Name: Phys. Rev., Sect. B. Condens. Matter; (United States) Vol. 19:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
IRON ALLOYS
LANTHANUM ALLOYS
LUTETIUM ALLOYS
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
YTTRIUM ALLOYS
ZIRCONIUM ALLOYS