Interplay between Co 3d and Ce 4f magnetism in CeCoAsO

被引：20

作者：

Sarkar, Rajib ^{[1
]}

Jesche, Anton ^{[1
]}

Krellner, Cornelius ^{[1
]}

Baenitz, Michael ^{[1
]}

Geibel, Cristoph ^{[1
]}

Mazumdar, Chandan ^{[2
]}

Poddar, Asok ^{[2
]}

机构：

[1] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[2] Saha Inst Nucl Phys, ECMP Div, Kolkata 700064, W Bengal, India

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 05期

关键词：

SUPERCONDUCTIVITY; HEAT;

D O I：

10.1103/PhysRevB.82.054423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the ground-state properties of polycrystalline CeCoAsO by means of magnetization, specific heat, and solid-state NMR. Susceptibility and specific-heat measurements suggest a ferromagnetic order at about, T-C=75 K. No further transitions are found down to 0.5 K. At 6.5 K a complex Schottky type of anomaly shows up in the specific-heat results. The interplay between Ce 4f and Co 3d magnetism being responsible for that anomaly is discussed. Furthermore As-75-NMR investigations have been performed to probe the magnetism on a microscopic scale. As-NMR spectra are analyzed in terms of first and second-order quadrupolar interaction. The anisotropic shift component K-ab and K-c could be derived from the As-75 powder spectra. Towards lower temperature a strong shift anisotropy was found. Nonetheless K-iso tracks the bulk susceptibility down to T=50 K very well. Furthermore the presence of weak correlations among the Ce ions in the ferromagnetic state is discussed. The observed increase in C/T towards lower temperatures supports this interpretation.

引用

页数：6

共 39 条

[21] Single crystal growth and anisotropy of CeRuPO [J].

Krellner, C. ;

Geibel, C. .

JOURNAL OF CRYSTAL GROWTH, 2008, 310 (7-9) :1875-1880

[22] Interplay between 3d and 4f magnetism in CeCoPO [J].

Krellner, C. ;

Burkhardt, U. ;

Geibel, C. .

PHYSICA B-CONDENSED MATTER, 2009, 404 (19) :3206-3209

[23] Relevance of ferromagnetic correlations for the electron spin resonance in kondo lattice systems [J].

Krellner, C. ;

Foerster, T. ;

Jeevan, H. ;

Geibel, C. ;

Sichelschmidt, J. .

PHYSICAL REVIEW LETTERS, 2008, 100 (06)

[24] Specific heat at low temperatures and magnetic measurements in Nd0.5Sr0.5MnO3 and R0.5Ca0.5MnO3 (R=Nd, Sm, Dy, and Ho) samples -: art. no. 214402 [J].

López, J ;

de Lima, OF ;

Lisboa, PN ;

Araujo-Moreira, FM .

PHYSICAL REVIEW B, 2002, 66 (21) :1-7

[25] Phase diagram of CeFeAs1-xPxO obtained from electrical resistivity, magnetization, and specific heat measurements [J].

Luo, Yongkang ;

Li, Yuke ;

Jiang, Shuai ;

Dai, Jianhui ;

Cao, Guanghan ;

Xu, Zhu-an .

PHYSICAL REVIEW B, 2010, 81 (13)

[26] Interplay of rare earth and iron magnetism in RFeAsO (R=La, Ce, Pr, and Sm): Muon-spin relaxation study and symmetry analysis [J].

Maeter, H. ;

Luetkens, H. ;

Pashkevich, Yu. G. ;

Kwadrin, A. ;

Khasanov, R. ;

Amato, A. ;

Gusev, A. A. ;

Lamonova, K. V. ;

Chervinskii, D. A. ;

Klingeler, R. ;

Hess, C. ;

Behr, G. ;

Buechner, B. ;

Klauss, H. -H. .

PHYSICAL REVIEW B, 2009, 80 (09)

[27] Magnetic phase transitions in NdCoAsO [J].

McGuire, Michael A. ;

Gout, Delphine J. ;

Garlea, V. Ovidiu ;

Sefat, Athena S. ;

Sales, Brian C. ;

Mandrus, David .

PHYSICAL REVIEW B, 2010, 81 (10)

[28] 59Co and 75As NMR investigation of lightly doped Ba(Fe1-xCox)2As2 (x=0.02,0.04) [J].

Ning, F. L. ;

Ahilan, K. ;

Imai, T. ;

Sefat, A. S. ;

Jin, R. ;

McGuire, M. A. ;

Sales, B. C. ;

Mandrus, D. .

PHYSICAL REVIEW B, 2009, 79 (14)

[29] Spectroscopic Study of 75As and 139La NMR on Layered Structure Ferromagnet LaCoAsO [J].

Ohta, Hiroto ;

Michioka, Chishiro ;

Yoshimura, Kazuyoshi .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2010, 79 (05)

[30] Magnetic properties of LCoAsO (L=La-Gd) [J].

Ohta, Hiroto ;

Yoshimura, Kazuyoshi .

PHYSICAL REVIEW B, 2009, 80 (18)

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