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Volumn 76, Issue 2, 2007, Pages

Experimental and theoretical studies of NMR in PrFe4P 12 - Suggestion of antiferro-monopole type ordering

Author keywords

Antiferro monopole order; Antiferro quadrupolar order; Hyperfine interaction; NMR; PrFe4P12; Skutterudite

Indexed keywords


EID: 33847417636     PISSN: 00319015     EISSN: 13474073     Source Type: Journal    
DOI: 10.1143/JPSJ.76.024710     Document Type: Article
Times cited : (44)

References (35)
  • 17
    • 33847371769 scopus 로고    scopus 로고
    • A part of the present work was presented in Joint Workshop on NQP-Skutterudites and NPM in Multi-approach Nov. 21-24, 2005, Tokyo Metropolitan University, Program and Abstracts, p. 86
    • A part of the present work was presented in Joint Workshop on NQP-Skutterudites and NPM in Multi-approach (Nov. 21-24, 2005, Tokyo Metropolitan University), Program and Abstracts, p. 86.
  • 20
    • 33847349004 scopus 로고    scopus 로고
    • When we classify multipoles in the spherical symmetry case, the cubic-invariant hexadecapole and the monopole have different character. If we consider the single site effects, the former operator causes the cubic crystalline field splitting of the electronic state, while the latter does not cause. Therefore they may be different in some sense even in cubic systems. We note that the monopole ordering also can induce the cubic crystalline field splitting in principle through the intersite interaction, for example, the simplest one is the electrostatic crystalline field effect of the monopole ordering. As explained in the main text, however, terms with higher harmonics of the direction cosine are necessary to reproduce the field-direction dependence of the NMR splitting. This may suggest the importance of the hexadecapole component in the ordering of this compounds
    • When we classify multipoles in the spherical symmetry case, the cubic-invariant hexadecapole and the monopole have different character. If we consider the single site effects, the former operator causes the cubic crystalline field splitting of the electronic state, while the latter does not cause. Therefore they may be different in some sense even in cubic systems. We note that the "monopole ordering" also can induce the cubic crystalline field splitting in principle through the intersite interaction, for example, the simplest one is the electrostatic crystalline field effect of the monopole ordering. As explained in the main text, however, terms with higher harmonics of the direction cosine are necessary to reproduce the field-direction dependence of the NMR splitting. This may suggest the importance of the hexadecapole component in the ordering of this compounds.
  • 22
    • 33847375252 scopus 로고    scopus 로고
    • in preparation
    • J. Kikuchi et al.: in preparation.
    • Kikuchi, J.1
  • 26
    • 33847339874 scopus 로고    scopus 로고
    • We use the popular notation in Oh group in this paper, though the point group around Pr is Th as noted in ref. 25. In fact the Th symmetry is important to solve many puzzling problems. The Tα(Γ4) and T β(Γ5) moments have the same character in the Th group. The Th symmetry is reflected in the invariant coupling form 1
    • h symmetry is reflected in the invariant coupling form (1).
  • 27
    • 33847404131 scopus 로고    scopus 로고
    • The change of the hyperfine field due to the change of the crystalline field state caused by perturbations preserving the local Th symmetry is responsible for this effect. For example, the change of the electronic state due to the cubic-local lattice distortion of Fe and P sites around Pr sites, and the electro-static field of the charge ordering of ions with Q will contribute
    • h symmetry is responsible for this effect. For example, the change of the electronic state due to the cubic-local lattice distortion of Fe and P sites around Pr sites, and the electro-static field of the charge ordering of ions with Q will contribute.
  • 33
    • 33847379515 scopus 로고    scopus 로고
    • Honestly speaking, the data at H ∥ [111] has been used to determine parameters in the row I of the Table I.
    • Honestly speaking, the data at H ∥ [111] has been used to determine parameters in the row I of the Table I.
  • 34
    • 33847410692 scopus 로고    scopus 로고
    • 1,4 is chosen.
    • 1,4 is chosen.
  • 35
    • 33847377231 scopus 로고    scopus 로고
    • In the strict sense, the AFQ and the AF-monopole states under the magnetic field will not be separated except the case of H ∥ [111
    • In the strict sense, the AFQ and the AF-monopole states under the magnetic field will not be separated except the case of H ∥ [111].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.