Electron Spin Resonance Of Gd3 + In The Antiferromagnetic Heavy Fermion Cein3 And Its Reference Compound Lain3

We report temperature dependent electron spin resonance (ESR) experiments of Gd3 + in CeIn3 and in its reference compound LaIn3 taken in crushed single crystals. For LaIn3 a single Dysonian Gd3 + ESR line with a nearly temperature independent g ~ 2.020 (5) is observed, and its linewidth follows a Korringa-like behavior as a function of temperature. From the Korringa rate (Δ H / Δ T ~ 16 Oe / K) and g-shift (Δ g ~ 0.027) we have extracted the exchange parameter between the Gd3 + local moments and the conduction electrons (ce) in this compound. This exchange parameter Jfs ≈ 20 meV was found to be ce wave-vector independent. For CeIn3, the Gd3 + ESR spectra were found to be weakly temperature dependent and present partly resolved Gd3 + fine-structure. Interestingly, for CeIn3, the g-shift with respect to the g-value of Gd3 + in insulators is negative, in contrast to the positive g-shift found for Gd3 + in LaIn3. These results suggests different electronic structure at the Gd3 + site in the Kondo antiferromagnet host CeIn3. Possibly, Kondo effect may cause a decrease of the s-like conduction electron density of states at the Gd3 + site, giving arise to an exchange interaction only between the Gd3 + local moment and the Ce 4f electrons. © 2009 Elsevier B.V. All rights reserved.4041929952998Lawrence, J.M., (1979) Phys. Rev. B, 20, p. 3770Nasu, S., van Diepen, A.M., Newman, H.H., Craig, R.S., (1971) J. Phys. Chem. Solids, 32, p. 2773Kurosawa, Y., Umehara, I., Kikuchi, M., Nagai, N., Satoh, K., Onuki, Y., (1990) J. Phys. Soc. Japan, 5, p. 1545Lawrence, J.M., Shapiro, S.M., (1980) Phys. Rev. B, 22, p. 4379Mathur, N.D., Grosche, F.M., Julian, S.R., Walker, I.R., Freye, D.M., Haselwimmer, R.K.W., Lonzarich, G.G., (1998) Nature, 394, p. 39Thompson, J.D., (2001) J. Magn. Magn. Mater., 226-230, p. 5Pagliuso, P.G., (2002) Phys. B, 312-313, p. 129Welsh, L.B., Gambino, R.J., Toxen, A.M., (1971) J. Appl. Phys., 42, p. 1545Rettori, C., Oseroff, S.B., Rao, D., Pagliuso, P.G., Barberis, G.E., Sarrao, J., Fisk, Z., Hundley, M., (1997) Phys. Rev. B, 55, p. 1016Pires, M.A., Mendonça Ferreira, L., Duque, J.G.S., Urbano, R.R., Agüero, O., Torriani, I., Rettori, C., Pagliuso, P.G., (2006) J. Appl. Phys., 99, pp. 08J311Canfield, P.C., Fisk, Z., (1992) Philos. Mag. B, 65, p. 1117Pagliuso, P.G., (2002) Phys. Rev. B, 66, p. 054433Duque, J.G.S., (2007) Phys. Rev. B, 76, p. 125114. , and references thereinFeher, G., Kip, A.F., (1955) Phys. Rev., 98, p. 337Dyson, F.J., (1955) Phys. Rev., 98, p. 349Pake, G.E., Purcell, E.M., (1948) Phys. Rev., 74, p. 1184Yosida, K., (1957) Phys. Rev., 106, p. 893Korringa, J., (1950) Physica, 16, p. 601Davidov, D., Maki, K., Orbach, R., Rettori, C., Chock, E.P., (1973) Solid State Comm., 12, p. 621Davidov, D., Orbach, R., Rettori, C., Shaltiel, D., Tao, L.J., Ricks, B., (1971) Phys. Lett., 35 A, p. 339Rettori, C., Kim, H.M., Chock, E.P., Davidov, D., (1974) Phys. Rev. B, 10, p. 1826Abragam, A., Bleaney, B., (1970) EPR of Transition Ions, , Clarendon Press, Oxford p. 335Moriya, T., (1963) J. Phys. Soc. Japan, 18, p. 516Narath, A., (1967) Phys. Rev., 163, p. 232Urbano, R.R., (2007) Phys. Rev. B, 75, p. 045107Pagliuso, P.G., Rettori, C., Oseroff, S.B., Canfield, P.C., Baggio-Saitovitch, E.M., Sanchez, D., (1998) Phys. Rev. B, 57, p. 3668Pinto, J.W.M., Frota, H.O., (2001) Phys. Rev. B, 64, p. 092404Pagliuso, P.G., Rettori, C., Sarrao, J.L., Cornelius, A., Hundley, M.F., Fisk, Z., Oseroff, S.B., (1999) Phys. Rev. B, 60, p. 1351