Spectroscopic Study of 75As and 139La NMR on Layered Structure Ferromagnet LaCoAsO

被引：14

作者：

Ohta, Hiroto ^{[1
]}

Michioka, Chishiro ^{[1
]}

Yoshimura, Kazuyoshi ^{[1
]}

机构：

[1] Kyoto Univ, Dept Chem, Grad Sch Sci, Kyoto 6068502, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2010年 / 79卷 / 05期

关键词：

cobalt pnictide; itinerant ferromagnet; two-dimensional; NMR spectroscopy; ZRCUSIAS TYPE-STRUCTURE; SUPERCONDUCTIVITY; SUSCEPTIBILITIES;

D O I：

10.1143/JPSJ.79.054703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

As-75 and La-139 field-swept NMR spectra were obtained for the novel weakly itinerant ferromagnet LaCoAsO with a two-dimensional layered structure above the Curie temperature of 55 K. By analyzing NMR spectra, temperature dependences of Knight shift K and nuclear quadrupole resonance frequency chi Q were obtained successfully for each nucleus. We confirmed from the so-called K-chi plots that the macroscopic magnetization of our LaCoAsO powder sample is intrinsic and does not contain the contribution from impurity phases. We estimated hyperfine coupling constants from the slope of K-chi plots and compared them with that of an iron-arsenide superconductor.

引用

页数：5

共 27 条

[1]

[Anonymous], 1985, Springer Series in Solid-State Sciences

[2]

CARTER GC, 1977, METALLIC SHIFTS NMR, P79

[3] 75As NMR studies of superconducting LaFeAsO0.9F0.1 [J].

Grafe, H. -J. ;

Paar, D. ;

Lang, G. ;

Curro, N. J. ;

Behr, G. ;

Werner, J. ;

Hamann-Borrero, J. ;

Hess, C. ;

Leps, N. ;

Klingeler, R. ;

Buechner, B. .

PHYSICAL REVIEW LETTERS, 2008, 101 (04)

[4] Pressure-induced superconductivity in quasi-2D CeRhIn5 [J].

Hegger, H ;

Petrovic, C ;

Moshopoulou, EG ;

Hundley, MF ;

Sarrao, JL ;

Fisk, Z ;

Thompson, JD .

PHYSICAL REVIEW LETTERS, 2000, 84 (21) :4986-4989

[5] Superconductivity in the PbO-type structure α-FeSe [J].

Hsu, Fong-Chi ;

Luo, Jiu-Yong ;

Yeh, Kuo-Wei ;

Chen, Ta-Kun ;

Huang, Tzu-Wen ;

Wu, Phillip M. ;

Lee, Yong-Chi ;

Huang, Yi-Lin ;

Chu, Yan-Yi ;

Yan, Der-Chung ;

Wu, Maw-Kuen .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2008, 105 (38) :14262-14264

[6] Growth of single crystal PrFeAsO1-y and its characterization [J].

Ishikado, M. ;

Shamoto, S. ;

Kito, H. ;

Iyo, A. ;

Eisaki, H. ;

Ito, T. ;

Tomioka, Y. .

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2009, 469 (15-20) :901-904

[7] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K [J].

Kamihara, Yoichi ;

Watanabe, Takumi ;

Hirano, Masahiro ;

Hosono, Hideo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) :3296-+

[8] Antiferromagnetism of SrFe2As2 Studied by Single-Crystal 75As-NMR [J].

Kitagawa, Kentaro ;

Katayama, Naoyuki ;

Ohgushi, Kenya ;

Takigawa, Masashi .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2009, 78 (06)

[9] Commensurate Itinerant Antiferromagnetism in BaFe2AS2: 75As-NMR Studies on a Self-Flux Grown Single Crystal [J].

Kitagawa, Kentaro ;

Katayama, Naoyuki ;

Ohgushi, Kenya ;

Yoshida, Makoto ;

Takigawa, Masashi .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (11)

[10] SUPERCONDUCTIVITY IN A LAYERED PEROVSKITE WITHOUT COPPER [J].

MAENO, Y ;

HASHIMOTO, H ;

YOSHIDA, K ;

NISHIZAKI, S ;

FUJITA, T ;

BEDNORZ, JG ;

LICHTENBERG, F .

NATURE, 1994, 372 (6506) :532-534

← 1 2 3 →