Nuclear Magnetic Resonance Studies of Some Materials Containing Divalent Europium

E. L. Boyd

doi:10.1103/PhysRev.145.174

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Nuclear Magnetic Resonance Studies of Some Materials Containing Divalent Europium

E. L. Boyd^*

IBM Watson Research Center, Yorktown Heights, New York

^*Present address: IBM Systems Development Division, Poughkeepsie, New York.

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Phys. Rev. 145, 174 – Published 6 May, 1966

DOI: https://doi.org/10.1103/PhysRev.145.174

Abstract

This paper reports the results of a low-temperature NMR experiment on ${Eu}^{153}$ in EuO. The data, which are assumed to be linear with magnetization, are compared with calculated values using spin-wave theory. Values of $\frac{J_{1}}{k_{b}} = 0.750 \pm 0.0025 °$ K and $\frac{J_{2}}{k_{b}} = - 0.0975 \pm 0.004 °$ K are found to give a good description of EuO. This paper also reports the results of NMR studies of the ligands $F^{19}$ and ${Cs}^{137}$ in Eu $F_{2}$ and CsEu $F_{3}$ . These experiments indicate that there is a reversal in sign of the unpaired spin density of the europium ion. The same results are obtained with europium-bearing glasses. This effect is discussed in terms of the Freeman-Watson model of ${Gd}^{3 +}$ and in terms of a virtual $5 d$ state in ${Eu}^{2 +}$ .

References (19)

G. A. Uriano and R. L. Streever, Phys. Letters 17, 205 (1965)
E. L. Boyd, Phys. Rev. 129, 1961 (1963) E. L. Boyd and J. C. Slonczewski, J. Appl. Phys. 33, 1077 (1962) S. Ogawa, S. Morimoto, and Y. Kimura, J. Phys. Soc. Japan 17, 1671 (1962)
S. H. Charap and E. L. Boyd, Phys. Rev. 133, A811 (1964)
A. M. Portis and A. C. Gossard, J. Appl. Phys. 31, 205S (1960)
P. G. de Gennes, P. A. Pincus, F. Hartman-Boutron, and J. M. Winter, Phys. Rev. 129, 1105 (1963)
N. W. Dalton and D. W. Wood, Phys. Rev. 138, A779 (1965)
G. S. Rushbrooke and P. J. Wood, Proc. Phys. Soc. (London) A68, 1161 (1955)
T. R. McGuire and M. W. Shafer, J. Appl. Phys. 35, 984 (1964)
B. A. Calhoun and J. Overmeyer, J. Appl. Phys. 35, 898 (1964)
R. J. Gambino and J. Overmeyer, Phys. Letters 9, 108 (1964)
A. J. Shuskus, Phys. Rev. 127, 2022, (1962)
J. Goodenough, Magnetism and the Chemical Bond (Interscience Publishers, Inc., New York, 1963)
S. Methfessel, Trans. IEEE (to be published) M. W. Shafer, J. Appl. Phys. 36, 1145 (1965)
R. G. Shulman and V. Jaccarino, Phys. Rev. 108, 1219 (1957)
Dr. S. Pickart (private communication)
K. Lee, H. Muir, and E. Catalano, J. Appl. Phys. 36, 1043 (1965)
J. M. Baker and J. P. Hurrell, Proc. Phys. Soc. 82, 742 (1963)
R. E. Watson and A. J. Freeman, Phys. Rev. Letters 6, 277 (1961)
S. Greenblatt and P. J. Bray, J. Am. Ceram. Soc. (to be published)

[c1] G. A. Uriano and R. L. Streever, Phys. Letters 17, 205 (1965)

[c2] E. L. Boyd, Phys. Rev. 129, 1961 (1963) E. L. Boyd and J. C. Slonczewski, J. Appl. Phys. 33, 1077 (1962) S. Ogawa, S. Morimoto, and Y. Kimura, J. Phys. Soc. Japan 17, 1671 (1962)

[c3] S. H. Charap and E. L. Boyd, Phys. Rev. 133, A811 (1964)

[c4] A. M. Portis and A. C. Gossard, J. Appl. Phys. 31, 205S (1960)

[c5] P. G. de Gennes, P. A. Pincus, F. Hartman-Boutron, and J. M. Winter, Phys. Rev. 129, 1105 (1963)

[c6] N. W. Dalton and D. W. Wood, Phys. Rev. 138, A779 (1965)

[c7] G. S. Rushbrooke and P. J. Wood, Proc. Phys. Soc. (London) A68, 1161 (1955)

[c8] T. R. McGuire and M. W. Shafer, J. Appl. Phys. 35, 984 (1964)

[c9] B. A. Calhoun and J. Overmeyer, J. Appl. Phys. 35, 898 (1964)

[c10] R. J. Gambino and J. Overmeyer, Phys. Letters 9, 108 (1964)

[c11] A. J. Shuskus, Phys. Rev. 127, 2022, (1962)

[c12] J. Goodenough, Magnetism and the Chemical Bond (Interscience Publishers, Inc., New York, 1963)

[c13] S. Methfessel, Trans. IEEE (to be published) M. W. Shafer, J. Appl. Phys. 36, 1145 (1965)

[c14] R. G. Shulman and V. Jaccarino, Phys. Rev. 108, 1219 (1957)

[c15] Dr. S. Pickart (private communication)

[c16] K. Lee, H. Muir, and E. Catalano, J. Appl. Phys. 36, 1043 (1965)

[c17] J. M. Baker and J. P. Hurrell, Proc. Phys. Soc. 82, 742 (1963)

[c18] R. E. Watson and A. J. Freeman, Phys. Rev. Letters 6, 277 (1961)

[c19] S. Greenblatt and P. J. Bray, J. Am. Ceram. Soc. (to be published)

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Nuclear Magnetic Resonance Studies of Some Materials Containing Divalent Europium

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References (19)

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