MAGNETIC STUDY OF THE LIGHTER RARE-EARTH IONS IN THE IRON GARNETS
Journal Article
·
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
The magnetic behavior of the trivalent ions of La, Pr, Sm, and Eu in the iron garnets in the range 0 to 298 deg K has been determined, that of the Nd/sup 3+/ ion having been reported earlier. The diamagnetic ion La/sup 3+/ behaves similarly to Y/sup 3+/. An applied field of about 70 kOe appears to produce magnetic saturation of {Y/sub 2/Pr}Fe/sub 2/Fe/sub 3/O/sub 12/ at 4.2 deg K, the c ontribution of the Pr/sup 3+/ ion being 1.6 mu /sub BETA / at this temperature. The Sm/sup 3+/ ion introduces large anisotropy but spherical crystals of samarium iron garnet allowed to move freely in the applied field leads to saturation at relativeiy low fields. The Sm/sup 3+/ ion contributes a moment of 0.14 mu at 0 deg K to the net magnetization and behaves similarly to the Pr/sup 3+/ and Nd/sup 3+/ ions at temperatures below 298 deg K in that its moment adds to that of the resultant of the iron sublattice moments. Results of measurements of a single-crystal sphere of europium iron garnet are in agreement with those made on a polycrystalline specimen by Villers et al. (auth)
- Research Organization:
- Bell Telephone Labs., Murray Hill, N.J.
- NSA Number:
- NSA-17-031186
- OSTI ID:
- 4672045
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 131; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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OSTI ID:7334543