Abstract
Magnetic and electric hyperfine interactions in the system EuSm were investigated with the isomeric 11/2− state in145Eu by applying the time-differential perturbed angular distribution (TDPAD) method. The temperature dependence of paramagnetism was studied between 90 K and 1000 K by measuring the magnetic hyperfine interaction frequency ωL=gNμNħ1 β(T)Bext. The paramagnetic correction factor β strictly follows the Curie-Weiss relation β=1+C/(T-θ), withC=−50(2) K and θ=−29(5) K. This is compatible with a hyperfine field ofB int(0)=−25(1) T, a valence of two for Eu in Sm, and antiferromagnetic order at low temperatures.
The temperature dependence of the electric quandrupole coupling constant vQ, investigated between 100 K and 400 K, can be reproduced by a linear temperature variation vQ(T)=vQ(0) (1-AT), with vQ(0)=16.2(4) MHz andA=7.2(8)·10−4 K−1.
The paramagnetic relaxation time τrel of the nuclear alignment is proportional to the temperature of the sample, with τrel T−1=3.7(2) ·10−9s K−1.
This leads to the Korringa relation τJ T=const=5.1(5)·10−11s K for the relaxation time of the 4f electronic spinJ. Assuming that the relaxation ofJ is mainly caused by exchange interaction between conduction electrons and localized 4f electrons at the Eu site, an exchange integral of |J eff|=0.10(2) eV can be deduced.
Similar content being viewed by others
References
Bodenstedt, E.: The Electromagnetic Interaction in Nuclear Spectroscopy, Hamilton, W.D. (ed.), p. 735. Amsterdam: North-Holland 1975
Table of Isotopes. 7th Edition. Lederer, C.M., Shirley, V.S. (eds.) New York: Wiley 1978
Handbook of Chemistry and Physics. 56th Edition. Weast, R.C. (ed.). Cleveland: CRC Press 1975
Günther, C., Lindgren, I.: Perturbed Angular Correlations, Karlsson, E., Matthias, E., Siegbahn, K. (eds.), p. 357. Amsterdam: North-Holland 1964
Klinger, W., Böhm, R., Engel, W., Sandner, W., Seeböck, R., Witthuhn, W.: Z. Physik A290, 227 (1979)
Klinger, W., Böhm, R., Sandner, W., Seeböck, R., Witthuhn, W.: (submitted to Nucl. Phys. A)
Böhm, R.: Thesis, Erlangen (1979)
Frauenfelder, H., Steffen, R.M.: Alpha, Beta- and Gamma-Ray-Spectroscopy, Siegbahn, K. (ed.), Vol. 2, p. 997. Amsterdam: North-Holland 1966
Steffen, R.M., Alder, K.: The Electromagnetic Interaction in Nuclear Spectroscopy. Hamilton, W.D. (ed.), p. 505. Amsterdam: North-Holland 1975
Haas, H.: Phys. Scr.11, 221 (1975)
Dafni, E., Sprouse, G.D.: Hyper. Interactions4, 777 (1978)
Keitel, R.: Thesis, Erlangen (1978)
Abragam, A., Pound, R.V.: Phys. Rev.92, 943 (1953)
Ingwersen, H., Klinger, W., Kreische, W., Lampert, W., Schatz, G., Witthuhn, W., Ivanov, E.A.: Nucl. Phys. A171, 241 (1971)
Fromm, W.D., Funkel, L., Schilling, K.D.: Phys. Scr.12, 91 (1975)
Heubes, P., Johann, H.G., Klinger, W., Kreische, W., Lampert, W., Loeffler, W., Schatz, G., Witthuhn, W.: Nucl. Phys. A188, 417 (1972)
Bleck, J., Haag, D.W., Ribbe, W.: Nucl. Instrum. Methods67, 169 (1969)
Kaufmann, E.N., Vianden, R.J.: Rev. Mod. Phys.51, 161 (1979)
Barrett, P.H., Shirley, D.A.: Phys. Rev.131, 123 (1963)
Pirich, R.G., Burr, C.R., Shenoy, G.K., Dunlap, B.D., Smits, B., Phillips, J.D.: Phys. Rev. Lett.38, 1142 (1977)
Varma, C.M.: Rev. Mod. Phys.48, 219 (1976)
de Menezes, O.L.T., Troper, A., Lederer, P., Gomes, A.A.: Phys. Rev. B17, 1997 (1978)
Newman, D.J.: Solid State Commun.18, 667 (1976)
Martin, D.H.: Magnetism in Solids. London: Iliffe Books 1967
Henning, W., Bähre, G., Kienle, P.: Hyperfine Interactions in Excited Nuclei. Goldring, G., Kalish, R. (eds.) Vol. 3, p. 795. New York-London-Paris: Gordon and Breach 1971
Kalish, R., Shreter, U., Grunzweig-Genossar, J.: Hyper. Interactions1, 65 (1975)
Baker, J.M., Williams, F.I.B.: Proc. R. Soc. London Ser. A267, 283 (1962)
Shore, F.J., Reynolds, C.A., Sailor V.L., Brunhard, G.: Phys. Rev. B138, 1361 (1965)
Abd Elmegid, M.M., Kaindl, G.: Hyper. Interactions4, 420 (1978)
Hüfner, S.: Phys. Rev. Lett.19, 1034 (1967)
Koster, T.A., Shirley, D.A.: Hyperfine Interactions in Excited Nuclei. Goldring, G., Kalish, R. (eds.), Vol. 4, p. 1239, New York-London-Paris: Gordon and Breach 1971
Freeman, A.J., Watson, R.E.: Phys. Rev.127, 2058 (1962)
Shirley, D.A., Frankel, R.B., Wickman, H.H.: Rev. Mod. Phys.36, 392 (1964)
Passell, L., Sailor, V.L., Shermer, R.L.: Phys. Rev. A135, 1767 (1964)
Hüfner, S., Wernick, J.H.: Phys. Rev.173, 448 (1968)
Koehler, W.C., Moon, R.M.: Phys. Rev. Lett.29, 1468 (1972)
Olsen, C.E., Nereson, N.G., Arnold, G.P.: J. Appl. Phys. Suppl.33, 1135 (1962)
Nereson, N.G., Olsen, C.E., Arnold, G.P.: Phys. Rev.135, A 176 (1964)
Beeken, R.B., Savage, W.R.: Phys. Rev. B15, 5307 (1977)
Hempel, G., Ingwersen, H., Klinger, W., Loeffler, W., Sandner, W., Witthuhn, W.: Phys. Lett. A55, 51 (1975)
Schatz, G., Rafailovich, M.H., Little, W.A., Sprouse, G.D.: Phys. Rev. Lett.35, 1086 (1975)
Schatz, G., Heubes, P.: Hyper. Interactions4, 751 (1978)
Netz, G., Prieske, W., Daum, H., Gerdau, E., Lakshminarayana, V.: Hyper. Interactions3, 147 (1977)
Ketel, T.J., Vervaet, E.A.Z.M., Verheul, H.: Z. Physik A291, 319 (1979)
Keitel, R., Bertschat, H.H., Butt, R., Grawe, H., Haas, H., Hahn, D., Klaumünzer, S., Menningen, M., Sielemann, R., Zeitz, W.D.: Z. Physik A290, 229 (1979)
Korringa, J.: Physica16, 601 (1950)
Hasegawa, J.: Progr. Theor. Phys.21, 483 (1959)
Lounasmaa, O.V.: Phys. Rev.126, 1352 (1962)
Lounasmaa, O.V., Sundström, L.J.: Phys. Rev.158, 591 (1967)
Koopmann, G., Engel, U., Baberschke, K., Hüfner, S.: Solid State Commun.11, 1197 (1972)
Koopmann, G., Baberschke, K., Hüfner, S.: Physica B86–88, 509 (1977)
Schmidt, H.K., Schäfer, W., Keller, G., Elschner, B.: Phys. Lett. A38, 201 (1972)
Schmidt, H.K.: Z. Naturforsch. Teil A27, 191 (1972)
Christiansen, J., Heubes, P., Keitel, R., Klinger, W., Loeffler, W., Sandner, W., Witthuhn, W.: Z. Physik B24, 177 (1976)
Rasera, R.L., Dunlap, B.D., Shenoy, G.K.: Phys. Rev. Lett.41, 1188 (1978)
Forker, M., Steinborn, W.: Phys. Rev. B20, 1 (1979)
Forker, M., Scholz, S.: Hyper. Interactions 7, 353 (1979)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Böhm, R., Engel, W., Hoth, S. et al. Magnetic and electric hyperfine interactions in the system EuSm . Z. Physik B - Condensed Matter 39, 115–124 (1980). https://doi.org/10.1007/BF01301516
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01301516