Probing the Jeff=0 ground state and the Van Vleck paramagnetism of the Ir5+ ions in layered Sr2Co0.5Ir0.5O4

被引：18

作者：

Agrestini, S. ^{[1
,2
]}

Kuo, C-Y ^{[1
,12
]}

Chen, K. ^{[3
,13
]}

Utsumi, Y. ^{[1
,14
]}

Mikhailova, D. ^{[1
,4
]}

Rogalev, A. ^{[5
]}

Wilhelm, F. ^{[5
]}

Foerster, T. ^{[6
]}

Matsumoto, A. ^{[7
,8
]}

Takayama, T. ^{[7
,8
,9
]}

Takagi, H. ^{[7
,8
,9
,10
]}

Haverkort, M. W. ^{[1
,11
]}

Hu, Z. ^{[1
]}

Tjeng, L. H. ^{[1
]}

机构：

[1] Max Planck Inst Chem Phys Solids, Nothnitzerstr 40, D-01187 Dresden, Germany

[2] ALBA Synchrotron Light Source, E-08290 Barcelona, Spain

[3] Univ Cologne, Inst Phys 2, Zulpicher Str 77, D-50937 Cologne, Germany

[4] Leibniz Inst Solid State & Mat Res IFW Dresden e, Helmholtzstr 20, D-01069 Dresden, Germany

[5] ESRF European Synchrotron, 71 Ave Martyrs, F-38000 Grenoble, France

[6] Helmholtz Zentrum Dresden Rossendorf, Hochfeld Magnetlab Dresden HLD EMFL, D-01314 Dresden, Germany

[7] Univ Tokyo, Dept Phys, 7-3-1 Hongo, Tokyo 1130033, Japan

[8] Univ Tokyo, Dept Adv Mat, 7-3-1 Hongo, Tokyo 1130033, Japan

[9] Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany

[10] Univ Stuttgart, Inst Funct Matter & Quantum Technol, Pfaffenwaldring 57, D-70569 Stuttgart, Germany

[11] Heidelberg Univ, Inst Theoret Phys, Philosophenweg 19, D-69120 Heidelberg, Germany

[12] Natl Synchrotron Radiat Res Ctr, 101 Hsin Ann Rd, Hsinchu 30076, Taiwan

[13] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France

[14] Inst Phys, Bijenicka 46, Zagreb 10000, Croatia

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 21期

关键词：

RAY CIRCULAR-DICHROISM; SCATTERING;

D O I：

10.1103/PhysRevB.97.214436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a combined experimental and theoretical x-ray magnetic circular dichroism (XMCD) spectroscopy study at the Ir-L-2,L-3 edges on the Ir5+ ions of the layered hybrid solid state oxide Sr2Co0.5Ir0.5O4 with the K2NiF4 structure. From theoretical simulation of the experimental Ir-L-2,L-3 XMCD spectrum, we found a deviation from a pure J(eff) = 0 ground state with an anisotropic orbital-to-spin moment ratio (L-X/2S(X) = 0.43 and L-Z/2S(Z) = 0.78). This deviation is mainly due to multiplet interactions being not small compared to the cubic crystal field and due to the presence of a large tetragonal crystal field associated with the crystal structure. Nevertheless, our calculations show that the energy gap between the singlet ground state and the triplet excited state is still large and that the magnetic properties of the Ir5+ ions can be well described in terms of singlet Van Vleck paramagnetism.

引用

页数：8

共 41 条

[1] Intricacies of the Co3+ spin state in Sr2Co0.5Ir0.5O4: An x-ray absorption and magnetic circular dichroism study [J].

Agrestini, S. ;

Kuo, C-Y. ;

Mikhailova, D. ;

Chen, K. ;

Ohresser, P. ;

Pi, T. W. ;

Guo, H. ;

Komarek, A. C. ;

Tanaka, A. ;

Hu, Z. ;

Tjeng, L. H. .

PHYSICAL REVIEW B, 2017, 95 (24)

[2] Long-range interactions in the effective low-energy Hamiltonian of Sr2IrO4: A core-to-core resonant inelastic x-ray scattering study [J].

Agrestini, S. ;

Kuo, C. -Y. ;

Sala, M. Moretti ;

Hu, Z. ;

Kasinathan, D. ;

Ko, K. -T. ;

Glatzel, P. ;

Rossi, M. ;

Cafun, J. -D. ;

Kvashnina, K. O. ;

Matsumoto, A. ;

Takayama, T. ;

Takagi, H. ;

Tjeng, L. H. ;

Haverkort, M. W. .

PHYSICAL REVIEW B, 2017, 95 (20)

[3] Structure and properties of α-NaFeO2-type ternary sodium iridates [J].

Baroudi, Kristen ;

Yim, Cindi ;

Wu, Hui ;

Huang, Qingzhen ;

Roudebush, John H. ;

Vavilova, Eugenia ;

Grafe, Hans-Joachim ;

Kataev, Vladislav ;

Buechner, Bernd ;

Ji, Huiwen ;

Kuo, Changyang ;

Hu, Zhiwei ;

Pi, Tun-Wen ;

Pao, Chiwen ;

Lee, Jyhfu ;

Mikhailova, Dania ;

Tjeng, Liu Hao ;

Cava, R. J. .

JOURNAL OF SOLID STATE CHEMISTRY, 2014, 210 (01) :195-205

[4] Breakdown of J=0 nonmagnetic state in d4 iridate double perovskites: A first-principles study [J].

Bhowal, Sayantika ;

Baidya, Santu ;

Dasgupta, Indra ;

Saha-Dasgupta, Tanusri .

PHYSICAL REVIEW B, 2015, 92 (12)

[5] Orbital reconstruction in nonpolar tetravalent transition-metal oxide layers [J].

Bogdanov, Nikolay A. ;

Katukuri, Vamshi M. ;

Romhanyi, Judit ;

Yushankhai, Viktor ;

Kataev, Vladislav ;

Buechner, Bernd ;

van den Brink, Jeroen ;

Hozoi, Liviu .

NATURE COMMUNICATIONS, 2015, 6

[6] NaIrO3-A pentavalent post-perovskite [J].

Bremholm, M. ;

Dutton, S. E. ;

Stephens, P. W. ;

Cava, R. J. .

JOURNAL OF SOLID STATE CHEMISTRY, 2011, 184 (03) :601-607

[7] Valence, spin, and orbital state of Co ions in one-dimensional Ca3Co2O6:: An x-ray absorption and magnetic circular dichroism study [J].

Burnus, T. ;

Hu, Z. ;

Haverkort, M. W. ;

Cezar, J. C. ;

Flahaut, D. ;

Hardy, V. ;

Maignan, A. ;

Brookes, N. B. ;

Tanaka, A. ;

Hsieh, H. H. ;

Lin, H. -J. ;

Chen, C. T. ;

Tjeng, L. H. .

PHYSICAL REVIEW B, 2006, 74 (24)

[8] Local electronic structure and magnetic properties of LaMn0.5Co0.5O3 studied by x-ray absorption and magnetic circular dichroism spectroscopy [J].

Burnus, T. ;

Hu, Z. ;

Hsieh, H. H. ;

Joly, V. L. J. ;

Joy, P. A. ;

Haverkort, M. W. ;

Wu, Hua ;

Tanaka, A. ;

Lin, H. -J. ;

Chen, C. T. ;

Tjeng, L. H. .

PHYSICAL REVIEW B, 2008, 77 (12)

[9] Novel Magnetism of Ir5+(5d4) ions in the Double Perovskite Sr2YIrO6 [J].

Cao, G. ;

Qi, T. F. ;

Li, L. ;

Terzic, J. ;

Yuan, S. J. ;

DeLong, L. E. ;

Murthy, G. ;

Kaul, R. K. .

PHYSICAL REVIEW LETTERS, 2014, 112 (05)

[10] X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS [J].

CARRA, P ;

THOLE, BT ;

ALTARELLI, M ;

WANG, XD .

PHYSICAL REVIEW LETTERS, 1993, 70 (05) :694-697

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