THE SPECIFIC HEATS OF LaNi5, GdNi5 AND TbNi5 COMPOUNDS BETWEEN 2 AND 50 K
Keywords:
Specific Heat, Heat Capacity, Rear Earth Compounds, RE-Ni5 Compounds, Magnetic Phase TransitionAbstract
The specific heats of the intermetallic rare earth compounds LaNi5, GdNi5 and TbNi5 have been investigated in the temperature range 2 to 50K in order to reexamine the low temperature specific heat of the non-magnetic LaNi5 compound and to study the magnetic contributions to the specific heat in the magnetic GdNi5 and TbNi5 compounds around their Curie temperatures. The low temperature specific heat of the LaNi5 compound shows an unusual anomaly.
The magnetic specific heats of the GdNi5 and TbNi5 compounds show l-type anomalies. These compounds show other anomalies at about 3.8 K and 2.4 K respectively. These anomalies have been attributed to the presence of Gd2O3 and Tb2O3 magnetic compounds as impurities.
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- Wernick J.H. and Geller S., Acta Crysta., 12, (1959), p. 662.
- Ott H.R., Anderes K., Bucher E. and Maita J.P., Solid State Commun., 18, (1976), p.1303.
- Nesbitt E.A., Williams H.J., Wernick J.H. and Sherwood R.C., J. Appl. Phys., 33, (1962), p. 1974.
- van Mal H.H., Philips Res. Rep. Suppl., 1(1976).
- Andres K. and Darack S., Physica, 86-88 B+C, (1977), p. 1071.
- Goremychkin E.A., Muhler E., Ivanitskii P.G., Krotenko V.T., Pasechnik M.V., Slisenko V.V., Vasilkevich A.A., Lippold B., Chistyakov O.D. and Savitskii E.M., Phys. State Soli.(b), 121, (1984), p. 623.
- Barthem V.M.T.S., Gignoux D., Schmitt D. and Creuzet G., J. Magn. Magn. Mater., 78 (1989), p.56.
- Lippold B., Muller H. and Mahmoud S., Phys. State Soli. (b), 141 (1987), p.247.
- Gignoux D., Givord D. and Del Moral A., Solid State Commun., 19 (1976), p.891.
- Nasu S., Neumann H.H., Marzouk N., Craig R.S. and Wallace W.E., J. Phys. Chem. Solids, 32 (1971), p.2779.
- Nait-Saada A., Thesis. Inst. Nat.Polytechnique de Grenoble (1980).
- Sanker S.G., Keller D.A., Craig R.S., Wallace W.E. and Rao V.U.S., J. Sol. Stat. Chem., 9 (1974), p.78.
- Gratz E., Goremychkin E., Latroche M., Hilscher G., Rotter M., Muller H., Lindbaum A., Michor H., Paul-Bancour V. and Fernandez-Diaz, J. Phys.: Condens. Matter., 11 (1999), p.7893.
- Kuchin A.G., Ermolenko A.S., Khrabrov V.I., Kourov N.I., Makarova G.M., Belozerov Ye. V., Lapina T.P. and Kulikov Yu. A., J. Magn. Magn. Mater., 238 (2002), p.29.
- Hattori Y., Fukamichi K., Suzuki K., Niikura A., Tsai A.P., Inoue A. and Masumoto T., J. Phys.: Condens. Matter., 7 (1995), p.4183.
- Lanchester P.C. and Mohamed K.A., J. Phys. E: Instrum., 18 (1985), p. 581.
- Abrahams S.C., Bernstein J.L., Sherwood R.C., Wernick J.H. and Williams H.J., J. Phys. Chem. Solids, 25 (1964), p. 1069.
- Gignoux D., Nait-Saada A.and R. Perrier da la Bathie, J. de Physique, C5 (1979), p.188.
- Hill R.W., J. phys. C: Solid State Phys., 19 (1986), p. 673.
- Lounasmaa O.V. and Sundstrom L.J., Phys. Rev., 150 (1966), p.399.
- Wells P., Lanchester P.C., Jones D.W. and Jordan R.G., J. Phys. F: Metal Phys., 6 (1976), p. 11, and references there in.
- Mohammed K.A. (unpublished data).
- Hill R.W., Coesier J. and Hukin D.A., J. Phys. C: Solid State Phys., 16 (1983), p. 2871.
- Hill R.W., J. Phys. F: Metal Phys., 17 (1987), p. 243.
- de Boer F.R., Klaasse J., Aarts J., Bredl C.D., Lieke W., Rauchschwalbe U., Steglich F., Felten R., Umhofer U. and Weber G., J. Magn. Magn. Mater., 47& 48, (1985), p.60.
- Luong N.H., Franse J.J.M. and Hien T.D., J. Magn. Magn. Mater., 50 (1985), p. 153 &. J. Phys. F: Metal Phys., 15 (1985), p. 1751.
- Pleger H.R., Bruck E., Bran E., Oster F., Freimuth A. , Politt B., Roden B. and Wolleben D., J. Magn. Magn. Mater. 63&64 (1987), p. 107.
- Peysson Y., Ayache C., Salce B., Rossat-Mignod J., Kunii S. and Kasuya T., J. Magn. Magn. Mater., 47&48 (1985), p. 63.
- Mohammed K.A., Phys. stat. Sol. (a),169 (1998), p. 295.
- Craig R.S., Sanker S.G., Marzouk N., Rao V.U.S., Wallace W.E. and Segal E., J. Phys. Chem. Solids, 33 (1972), p.2267.
- Takasse K., Negishi H., Sasaki M. and Inoue M., J. Low Temp. Phys., 103 (1996), p. 107.
