Accession Number:

ADA064807

Title:

Study of the Magnetic Field Dependence of the Molecular Ni (CO)4 Formation Rate.

Descriptive Note:

Annual research rept. 1 Oct 77-30 Sep 78,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1978-12-20

Pagination or Media Count:

29.0

Abstract:

Initial work on the dependence of the nickel carbonylation rate on time, temperature and magnetic field has been completed and a manuscript describing this work in detail has been accepted for publication. Our current effort is in the study of the magnetic phase dependence of chemical activity the Hedvall Effect. The nickel carbonylation reaction offers an ideal system for the study of this effect. One of the advantages of this system is the availability of Ni1-x Cux alloys over the entire composition range 0 x 1, thereby making accessible a wide range of Curie temperatures. Our preliminary results on this system show that the ferromagnetic to paramagnetic transition leads to a large change in the activation energy for the carbonylation reaction. Auger measurements confirm that the chemical reaction emphasizes the surface Ni atoms while the activation energy emphasizes the bulk Ni. Author

Subject Categories:

  • Inorganic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE