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Critical Phenomena at the Antiferromagnetic Transition in MnO

Published online by Cambridge University Press:  10 February 2011

B.F. Woodfield ,
J.L. Shapiro ,
R. Stevens ,
J. Boerio-Goates  and
M.L. Wilson
B.F. Woodfield
Affiliation:
Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602 Brian_Woodfield@byu.edu
J.L. Shapiro
Affiliation:
Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602 Brian_Woodfield@byu.edu
R. Stevens
Affiliation:
Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602 Brian_Woodfield@byu.edu
J. Boerio-Goates
Affiliation:
Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602 Brian_Woodfield@byu.edu
M.L. Wilson
Affiliation:
University of Tulsa, Department of Physics, Tulsa, OK 74104
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Abstract

The specific heat of a polycrystalline sample of MnO was measured from T ≈ 1 K to T ≈ 400 K using two different experimental apparatuses at zero applied pressure. Features revealed by the data include a hyperfine contribution due to the Mn nuclei, a T2 temperature dependence at low temperatures due to the type-II antiferromagnetic magnon contribution, and a sharp but well defined antiferromagnetic transition (TN = 117.7095 K) that is clearly second order in nature. The critical exponent, α, deduced from the transition is consistent with a two dimensional Ising model. The specific heat of MnO is also compared with recent results on the type-A antiferromagnet LaMnO3.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 602: Symposium JJ – Magnetoresistive Oxides & Related Materials , 1999 , 245
Copyright
Copyright © Materials Research Society 2000

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References

1. Woodfield, B.F., Wilson, M.L., and Byers, J.M., Phys. Rev. Lett. 78, 3201–3204 (1997)Google Scholar
2. Shull, C.G., Strausser, W.A., and Wollan, E.O., Phys. Rev. 83, 333 (1951).Google Scholar
3. Li, Y.-Y., Phys. Rev. 100, 627 (1955).Google Scholar
4. Bloch, D. and Maury, R., Phys.Rev. B 7, 4883 (1973).Google Scholar
5. Robie, R.A. and Hemingway, B.S., J. Chem. Thermodyn. 17, 165–181 (1985)Google Scholar
6. Woodfield, B.F., Boerio-Goates, J., Shapiro, J.L., Putnam, R.L., and Navrotsky, A., J. Chem. Thermodyn. 31, 245–253 (1999)Google Scholar
7. Lines, M.E. and Jones, E.D., Phys. Rev. 139, 1313–1327 (1965)Google Scholar
8. Hotz, R. and Siems, R., Superlat. Microstruct. 3, 445–454 (1987)Google Scholar
9. Kohgi, M., Ishikawa, Y., Harada, I., and Motizuki, K., J. Phys. Soc. Japan 36, 112 (1974).Google Scholar
10. Hirota, K., Kaneko, N., Nishizawa, A., and Endoh, Y., J Phys. Soc. Japan 65, 3736 (1996).Google Scholar
11. Hermsmeier, B., Osterwalder, J., Friedman, D.J., and Fadley, C.S., Phys. Rev. Lett. 62, 478 (1988).Google Scholar
12 Boire, R. and Collins, M.F., Can. J. Phys. 55, 688 (1977).Google Scholar
13. Jagadeesh, M.S. and Seehra, M.S., Phys.Rev. B 23, 1185 (1981).Google Scholar
14. Srinivasan, G. and Seehra, M.S., Phys.Rev. B 28, 6542 (1983).Google Scholar
15. Bloch, D., Vettier, C., and Burlet, P., Phys. Lett. 75A, 301 (1980)Google Scholar
16. Stanely, H.E., Introduction to Phase Transitions and Critical Phenomena (Oxford University Press, New York, 1971).Google Scholar
17. Goldenfeld, N., Lectures on Phase Transitions and the Renormalization Group, Vol. 85 (Addison Wesley, Reading, 1992).Google Scholar
18. Onsager, L., Phys. Rev. 65, 117 (1944).Google Scholar