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Temperature Dependence of Ms and K 1 of BaFe12O19 and SrFe12O19 Single Crystals
Abstract
Single crystals of BaFe12O19 and SrFe12O19 were grown in a Na2O flux. Static magnetic measurements on the two crystal types were made to reveal Ms and K1 as functions of temperature. It was found that Ms of BaFe12O19 and SrFe12O19 are practically identical over the temperature range 77°K to the Curie point with a room-temperature value of 380 G. Extrapolations to absolute zero reveal that the Bohr magneton numbers are approximately 19.3 and 19.7 per molecule, respectively, while the Curie points are 740° and 750°K, respectively, for BaFe12O19 and SrFe12O19. K1 for SrFe12O19 is 10% higher than that of BaFe12O19 over the entire temperature range. Room temperature values are 3.25×106 and 3.57×106 erg/cc, respectively, for BaFe12O19 and SrFe12O19. Calculations made on the basis of the Stoner-Wohlfarth theory indicate that the intrinsic coercive force of SrFe12O19 will be higher than that of BeFe12O19 by about 10%. Theoretical room-temperature values of coercive force for an isotropic assembly of crystallites are 6000 Oe for BaFe12O19 and 6700 Oe for SrFe12O19.
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Citations
Cited by
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Laurent, S., Dutz, S., Häfeli, U. O., & Mahmoudi, M. (2011) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2011.04.003 · Cited by 1,326
Crystal structure and magnetic properties of the BaFe12−Al O19 (x=0.1–1.2) solid solutions
Trukhanov, A. V., Turchenko, V. O., Bobrikov, I. A., Trukhanov, S. V., Kazakevich, I. S., & Balagurov, A. M. (2015) · Journal of Magnetism and Magnetic Materials · doi:10.1016/j.jmmm.2015.05.076 · Cited by 449
Metadata
- Authors
- Shirk, B. T., & Buessem, W. R.
- Venue
- Journal of Applied Physics
- Publisher
- AIP Publishing
- Published
- 1969-03-01
- Volume
- 40
- Issue
- 3
- Pages
- 1294-1296
- ISSN
- 0021-8979 (ISSN-L)
- 1089-7550
- OpenAlex
- W2100864801
- Cited by
- 350
- References
- 0
- FWCI
- 1.98
- Type
- journal article
- Language
- en
- Open access
- closed
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- Shirk, B. T., & Buessem, W. R. (1969). Temperature Dependence of Ms and K 1 of BaFe12O19 and SrFe12O19 Single Crystals. Journal of Applied Physics. https://doi.org/10.1063/1.1657636
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