Masashi Hasegawa et al 2004 J. Phys.: Condens. Matter 16 7917 doi:10.1088/0953-8984/16/45/014
Masashi Hasegawa1, Shoichiro Suzuki1, Tetsu Ohsuna1, Eiichiro Matsubara1, Satoshi Endo2 and Akihisa Inoue1
Show affiliationsA new metastable La–Ge–Ni ternary BaAl4-type (ThCr2Si2-type) compound, of which the space group is I4/mmm is synthesized. It is obtained by a polymorphic transformation from an La6Ni34Ge60 amorphous alloy on crystallizing. The formula of the compound is (La0.3Ge0.7)(Ni0.85Ge0.15)2Ge2. This indicates that it is highly non-stoichiometric compared to the stoichiometric LaNi2Ge2. It is found that the c-axis lattice parameter of this compound is much longer than that of LaNi2Ge2. It should be noted that the longer c-axis unit cell parameter is attributable only to the longer interlayer distance between Ge site and Ni site layers. The temperature dependences of electrical resistivity and thermoelectric power of the (La0.3Ge0.7)(Ni0.85Ge0.15)2Ge2 compound and La6Ni34Ge60 amorphous alloy are also clarified. The comparison of these electronic properties between the two materials indicates that sp-electrons mainly contribute to the density of states around the Fermi level of this compound.
72.20.Pa Thermoelectric and thermomagnetic effects
72.15.Eb Electrical and thermal conduction in crystalline metals and alloys
72.80.Jc Other crystalline inorganic semiconductors
61.50.Ks Crystallographic aspects of phase transformations; pressure effects
Issue 45 (17 November 2004)
Received 28 July 2004, in final form 10 September 2004
Published 29 October 2004
Masashi Hasegawa et al 2004 J. Phys.: Condens. Matter 16 7917
X-J Liu et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 4801
S De Baerdemacker et al 2007 J. Phys. A: Math. Theor. 40 2733
Rabin Banerjee and Pradip Mukherjee 2002 J. Phys. A: Math. Gen. 35 5591
Duane A. Liedahl and Frits Paerels 1996 ApJ 468 L33
S Barcza 2005 J. Phys. A: Math. Gen. 38 2469
Piotr Nowakowski and Marek Napiórkowski 2009 J. Phys. A: Math. Theor. 42 475005
Gloria M Spirou et al 2005 Phys. Med. Biol. 50 N141
Thomas R. Ayres et al. 1998 ApJ 496 428
H Pursch et al 2002 J. Phys. D: Appl. Phys. 35 1757