HYPERFINE STRUCTURE OF Fe$sup 57$ IN YTTRIUM-IRON GARNET FROM THE MOSSBAUER EFFECT
The hyperfine structure of Fe/sup 5//sup 7/ in yttrium-iron garnet STAY/sub 3/Fe/sub 2/(FeO/sub 4/)/sub 3/! is obtained through the Mossbauer effect. A 0.002 in. thick slice of a single crystal of yttrium-iron garnet, cut normal to a STA110! direction, is used as an absorber of recoil-free gamma rays emitted by a stainless steel source. The iron in yttrium-iron garnet is located in two nonequivalent sites, tetrahedral and octahedral, each of which has an axially symmetric electric field gradient. Data are taken with the magnetization aligned in a STA111! and in a STA100! direction in order to produce the simplest absorption pattern. For each direction of magnetization, the absorption lines of Fe/sup 5//sup 7/ at both sites are resolved. The magnetic field at an Fe/sup 5//sup 7/ nucleus is found to bo 3.9 x lO/sup 5/ gauss at a tetrahedral site and 4.7 x lO/sup 5/ gauss at an octahedral site at room temperature ( approximately 300 deg K). The quadrupole coupling is found to be 7.5 x 10/sup -//sup 8/ ev in the tetrahedral site and 9.0 x 10/sup -//sup 8/ ev in the octahedral site. (auth)
- Research Organization:
- Bell Telephone Labs., Murray Hill, N.J.
- NSA Number:
- NSA-15-019919
- OSTI ID:
- 4065076
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 122; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Mossbauer Effect. Applications to Magnetism
STUDY OF THE LOW-TEMPERATURE TRANSITION IN MAGNETITE AND THE INTERNAL FIELDS ACTING ON IRON NUCLEI IN SOME SPINEL FERRITES, USING MOSSBAUER ABSORPTION