Crystal growth and physical properties of the new filled skutterudite

Kikuchi, Daisuke; Tatsuoka, Sho; Tanaka, Kenya; Kawahito, Yusuke; Ueda, Makoto; Shinozawa, Akihiro; Aoki, Hidekazu; Kuwahara, K.; Aoki, Yuji; Sato, Hideyuki

doi:10.1016/j.physb.2007.10.046

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…At T A ¼ 39 K, shows clear kink, indicating the phase transition in SmFe 4 As 12 . The resistivity for both SmFe 4 As 12 and LaFe 4 As 12 show a weak shoulder around 150 K, which is consistent with the previous result, 9,11) which may be attributable to scattering of the conduction electrons by spin fluctuations of the Fe 3d narrow band as in BaFe 4 Sb 12 13) or to the electron-phonon interactions in analogy with the case of V 3 Si. 14,15) To extract the 4f electrons contribution to the resitivity ( m ), we subtract the resistivity of LaFe 4 As 12 from that of SmFe 4 As 12 as ( SmFe 4 As 12 À LaFe 4 As 12 ) [shown in Fig.…”

Section: Resultssupporting

confidence: 89%

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Ferrimagnetism of New Filled Skutterudite SmFe₄As₁₂Synthesized at High Pressure

et al. 2010

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A new filled skutterudite SmFe 4 As 12 has been synthesized at high temperature and high pressure. The magnetic properties of this compound was studied in terms of electrical resistivity, magnetic susceptibility, magnetization, and specific heat measurments. SmFe 4 As 12 shows a magnetic transition at T A ¼ 39 K. Temperature dependence of the magnetic susceptibility and field dependence of T A observed in the specific heat measurement suggest ferrimagnetic alignment of the magnetic moments of Fe 3d band and Sm 4f electrons below T A .

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Section: Resultssupporting

confidence: 89%

“…On RFe 4 As 12 (R ¼ La, Sm), only preliminary results have been reported. [7][8][9][10][11] We report the systematic studies of the magnetic properties of high quality SmFe 4 As 12 and LaFe 4 As 12 synthesized under high pressure.…”

Section: Introductionmentioning

confidence: 99%

Ferrimagnetism of New Filled Skutterudite SmFe₄As₁₂Synthesized at High Pressure

et al. 2010

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“…In fact, to the best of our knowledge, no phase diagram information is available for any of the ternary RE−Fe−As systems. Reports in these systems have been restricted to several isolated phases: REFe 4 As 12 (RE = La−Nd, Sm), − EuFe 2 As 2 , − REFeAs (RE = La−Nd), and RE 6 Fe 13 As (RE = Pr, Nd) . All of these compounds are of interest because of their magnetic properties; in addition, EuFe 2 As 2 , if appropriately doped, is a possible candidate for superconductivity given its resemblance to AFe 2 As 2 (A = Ca, Ba, Sr). − …”

Section: Introductionmentioning

confidence: 99%

Ternary Rare-Earth Iron Arsenides RE₁₂Fe_57.5As₄₁ (RE = La, Ce)

2010

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The rare-earth iron arsenides RE(12)Fe(57.5)As(41) (RE = La, Ce) have been prepared by direct reactions of the elements in the presence of a Sn flux. Analysis of single-crystal X-ray diffraction data reveals that they adopt a new orthorhombic structure type (Pearson symbol oP236, space group Pmmn, Z = 2; a = 10.8881(9) A, b = 25.753(2) A, c = 12.5436(10) A for RE = La; a = 10.8376(8) A, b = 25.639(2) A, c = 12.4701(9) A for RE = Ce). In this metal-rich arsenide, the complex three-dimensional network (derived from 4 RE, 24 Fe, and 17 As sites) can be described as being built from unusual wavelike layers of connected As-centered trigonal prisms. Five of the Fe sites are partially occupied. The electronic structure of these compounds was probed through core-line X-ray photoelectron spectra. Magnetic susceptibility measurements indicated ferromagnetic ordering at T(C) = 125 and 95 K for the La and Ce compounds, respectively. Electrical resistivity measurements on single crystals of Ce(12)Fe(57.5)As(41) showed metallic behavior with a prominent transition that coincides closely with the ferromagnetic ordering temperature.

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