Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti{sub 0.95}Co{sub 0.05}O{sub 2} film

Hu, Wen; Hayashi, Kouichi; Fukumura, Tomoteru; Akagi, Kazuto; Tsukada, Masaru; Happo, Naohisa; Hosokawa, Shinya; Ohwada, Kenji; Takahasi, Masamitu; Suzuki, Motohiro; Kawasaki, Masashi

doi:10.1063/1.4921847

Title: Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti{sub 0.95}Co{sub 0.05}O{sub 2} film

Journal Article · Mon Jun 01 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4921847· OSTI ID:22415102

Hu, Wen ^[1]; Hayashi, Kouichi ^[2]; Fukumura, Tomoteru ^[3]; Akagi, Kazuto; Tsukada, Masaru ^[4]; Happo, Naohisa ^[5]; Hosokawa, Shinya ^[6]; Ohwada, Kenji; Takahasi, Masamitu ^[7]; Suzuki, Motohiro ^[8]; Kawasaki, Masashi ^[9]

National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
Department of Chemistry, The University of Tokyo, Tokyo 113-0033 (Japan)
Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
School of Information Sciences, Hiroshima City University, Hiroshima 731-3194 (Japan)
Department of Physics, Graduate School of Science and Technology, Kumamoto University, Kumamoto 860-8555 (Japan)
Japan Atomic Energy Agency, Hyogo 679-5148 (Japan)
JASRI/SPring-8, Hyogo 679-5198 (Japan)
Quantum Phase Electronics Center and Department of Applied Physics, The University of Tokyo, Tokyo 113-8656 (Japan)

To evaluate local atomic structures around Co in high temperature diluted ferromagnetic semiconductor Co-doped TiO{sub 2}, x-ray fluorescence holography and x-ray absorption fine structure experiments were carried out on rutile paramagnetic Ti{sub 0.99}Co{sub 0.01}O{sub 2} and ferromagnetic Ti{sub 0.95}Co{sub 0.05}O{sub 2} films. The Co atoms in the Ti{sub 0.99}Co{sub 0.01}O{sub 2} simply substituted for Ti sites in the rutile structure, whereas a suboxidic arrangement of CoO{sub 2}Ti{sub 4} formed around Co in the Ti{sub 0.95}Co{sub 0.05}O{sub 2} films. A theoretical investigation based on a series of first-principles calculations indicated the stability of the aggregated suboxidic clusters in the rutile TiO{sub 2}, supporting our hypothesis for the formation of suboxidic coordination in the highly Co-doped sample. The suboxidic coordination may be the source of strong exchange interaction, resulting in the high Curie temperature in Co-doped TiO{sub 2}.

Cite

Export

Save

OSTI ID:: 22415102

Journal Information:: Applied Physics Letters, Vol. 106, Issue 22; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951

Country of Publication:: United States

Language:: English

References (29)

Dilute Doping, Defects, and Ferromagnetism in Metal Oxide Systems Ogale, Satishchandra B. Advanced Materials, Vol. 22, Issue 29 https://doi.org/10.1002/adma.200903891	journal	June 2010
XAFS and CEMS study of dilute magneto-optical semiconductor, Fe doped TiO2 films Nomura, Kiyoshi; Eba, Hiromi; Sakurai, Kenji Thin Solid Films, Vol. 515, Issue 24 https://doi.org/10.1016/j.tsf.2007.03.177	journal	October 2007
X-ray holography with atomic resolution Tegze, Miklós; Faigel, Gyula Nature, Vol. 380, Issue 6569 https://doi.org/10.1038/380049a0	journal	March 1996
Anomalous Hall effect governed by electron doping in a room-temperature transparent ferromagnetic semiconductor Toyosaki, Hidemi; Fukumura, Tomoteru; Yamada, Yasuhiro Nature Materials, Vol. 3, Issue 4 https://doi.org/10.1038/nmat1099	journal	March 2004
Cobalt valence states and origins of ferromagnetism in Co doped TiO2 rutile thin films Murakami, Makoto; Matsumoto, Yuji; Hasegawa, Tetsuya Journal of Applied Physics, Vol. 95, Issue 10 https://doi.org/10.1063/1.1695598	journal	May 2004
Co-doped anatase TiO2 heteroepitaxy on Si(001) Kaspar, T. C.; Droubay, T.; Wang, C. M. Journal of Applied Physics, Vol. 97, Issue 7 https://doi.org/10.1063/1.1868854	journal	April 2005
Evolution of ferromagnetic circular dichroism coincident with magnetization and anomalous Hall effect in Co-doped rutile TiO2 Toyosaki, H.; Fukumura, T.; Yamada, Y. Applied Physics Letters, Vol. 86, Issue 18 https://doi.org/10.1063/1.1922569	journal	May 2005
Oxygen vacancy effect on room-temperature ferromagnetism of rutile Co:TiO2 thin films Yan, Wensheng; Sun, Zhihu; Pan, Zhiyun Applied Physics Letters, Vol. 94, Issue 4 https://doi.org/10.1063/1.3075844	journal	January 2009
Control of ferromagnetism at room temperature in (Ti,Co)O ₂₋ _δ via chemical doping of electron carriers Yamada, Y.; Fukumura, T.; Ueno, K. Applied Physics Letters, Vol. 99, Issue 24 https://doi.org/10.1063/1.3669505	journal	December 2011
X-ray fluorescence holography Hayashi, Kouichi; Happo, Naohisa; Hosokawa, Shinya Journal of Physics: Condensed Matter, Vol. 24, Issue 9 https://doi.org/10.1088/0953-8984/24/9/093201	journal	February 2012
Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO ₂ Fukumura, T.; Toyosaki, H.; Ueno, K. New Journal of Physics, Vol. 10, Issue 5 https://doi.org/10.1088/1367-2630/10/5/055018	journal	May 2008
Atoms, molecules, solids, and surfaces: Applications of the generalized gradient approximation for exchange and correlation Perdew, John P.; Chevary, J. A.; Vosko, S. H. Physical Review B, Vol. 46, Issue 11 https://doi.org/10.1103/physrevb.46.6671	journal	September 1992
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set Kresse, G.; Furthmüller, J. Physical Review B, Vol. 54, Issue 16, p. 11169-11186 https://doi.org/10.1103/physrevb.54.11169	journal	October 1996
Ti $K$ -edge XANES studies of Ti coordination and disorder in oxide compounds: Comparison between theory and experiment Farges, François; Brown, Gordon E.; Rehr, J. J. Physical Review B, Vol. 56, Issue 4 https://doi.org/10.1103/physrevb.56.1809	journal	July 1997
Local Co structure in epitaxial ${Co}_{x} {Ti}_{1 - x} O_{2 - x}$ anatase Chambers, S. A.; Heald, S. M.; Droubay, T. Physical Review B, Vol. 67, Issue 10 https://doi.org/10.1103/physrevb.67.100401	journal	March 2003
Phase transition in ${Ti}_{50} {Ni}_{44} {Fe}_{6}$ studied by x-ray fluorescence holography Hu, Wen; Hayashi, Kouichi; Yamamoto, Tokujiro Physical Review B, Vol. 80, Issue 6 https://doi.org/10.1103/physrevb.80.060202	journal	August 2009
Extent and feature of lattice distortions around Ga impurity atoms in InSb single crystal Hosokawa, S.; Happo, N.; Ozaki, T. Physical Review B, Vol. 87, Issue 9 https://doi.org/10.1103/physrevb.87.094104	journal	March 2013
Acute and obtuse rhombohedrons in the local structures of relaxor ferroelectric Pb(Mg $_{1 / 3}$ Nb $_{2 / 3}$ )O $_{3}$ Hu, Wen; Hayashi, Kouichi; Ohwada, Kenji Physical Review B, Vol. 89, Issue 14 https://doi.org/10.1103/physrevb.89.140103	journal	April 2014
Role of Ti $3 d$ Carriers in Mediating the Ferromagnetism of $Co ∶ {TiO}_{2}$ Anatase Thin Films Ohtsuki, T.; Chainani, A.; Eguchi, R. Physical Review Letters, Vol. 106, Issue 4 https://doi.org/10.1103/physrevlett.106.047602	journal	January 2011
Three Dimensional Imaging of Atoms with Isotropic 0.5 Å Resolution Tegze, M.; Faigel, G.; Marchesini, S. Physical Review Letters, Vol. 82, Issue 24 https://doi.org/10.1103/physrevlett.82.4847	journal	June 1999
Co-occurrence of Superparamagnetism and Anomalous Hall Effect in Highly Reduced Cobalt-Doped Rutile ${TiO}_{2 - δ}$ Films Shinde, S. R.; Ogale, S. B.; Higgins, J. S. Physical Review Letters, Vol. 92, Issue 16 https://doi.org/10.1103/physrevlett.92.166601	journal	April 2004
Signature of Carrier-Induced Ferromagnetism in ${Ti}_{1 - x} {Co}_{x} O_{2 - δ}$ : Exchange Interaction between High-Spin ${Co}^{2 +}$ and the Ti $3 d$ Conduction Band Quilty, J. W.; Shibata, A.; Son, J. -Y. Physical Review Letters, Vol. 96, Issue 2 https://doi.org/10.1103/physrevlett.96.027202	journal	January 2006
Theoretical approaches to x-ray absorption fine structure Rehr, J. J.; Albers, R. C. Reviews of Modern Physics, Vol. 72, Issue 3 https://doi.org/10.1103/revmodphys.72.621	journal	July 2000
Atomic imaging in EBCO superconductor films by an X-ray holography system using a toroidally bent graphite analyzer Sekioka, Tsuguhisa; Hayashi, Kouichi; Matsubara, Eiichiro Journal of Synchrotron Radiation, Vol. 12, Issue 4 https://doi.org/10.1107/s0909049505006497	journal	June 2005
Room-Temperature Ferromagnetism in Transparent Transition Metal-Doped Titanium Dioxide Matsumoto, Y. Science, Vol. 291, Issue 5505 https://doi.org/10.1126/science.1056186	journal	January 2001
Electrically Induced Ferromagnetism at Room Temperature in Cobalt-Doped Titanium Dioxide Yamada, Y.; Ueno, K.; Fukumura, T. Science, Vol. 332, Issue 6033 https://doi.org/10.1126/science.1202152	journal	May 2011
Comparison among the local atomic order of amorphous TM-Ti alloys (TM = Co, Ni, Cu) produced by mechanical alloying studied by EXAFS Machado, K. D.; de Lima, J. C.; Campos, C. E. M. The European Physical Journal B - Condensed Matter and Complex Systems, Vol. 37, Issue 4 https://doi.org/10.1140/epjb/e2004-00076-2	journal	February 2004
Ferromagnetism in Co-Doped TiO2 Rutile Thin Films Grown by Laser Molecular Beam Epitaxy Matsumoto, Yuji; Takahashi, Ryota; Murakami, Makoto Japanese Journal of Applied Physics, Vol. 40, Issue Part 2, No. 11B https://doi.org/10.1143/jjap.40.l1204	journal	November 2001
X-ray holography with atomic resolution Tegze, M.; Faigel, G. Acta Crystallographica Section A Foundations of Crystallography, Vol. 52, Issue a1 https://doi.org/10.1107/s0108767396079779	journal	August 1996

Cited By (8)

Algorithm for Atomic Resolution Holography Using Modified L ₁ -Regularized Linear Regression and Steepest Descent Method Matsushita, Tomohiro physica status solidi (b), Vol. 255, Issue 11 https://doi.org/10.1002/pssb.201800091	journal	July 2018
White Neutron Holography in Pulsed Neutron Facilities Ohoyama, Kenji; Hayashi, Kouichi physica status solidi (b), Vol. 255, Issue 11 https://doi.org/10.1002/pssb.201800143	journal	July 2018
Local structural analysis of In-doped Bi ₂ Se ₃ topological insulator using X-ray fluorescence holography Kimura, Koji; Hayashi, Koichi; Yashina, Lada V. Surface and Interface Analysis, Vol. 51, Issue 1 https://doi.org/10.1002/sia.6544	journal	September 2018
Application of X-ray fluorescence holography to the analysis of the interior and surface of an yttrium oxide thin film Stellhorn, Jens R.; Hosokawa, Shinya; Happo, Naohisa Surface and Interface Analysis, Vol. 51, Issue 1 https://doi.org/10.1002/sia.6550	journal	September 2018
Investigation of local structural environments and room-temperature ferromagnetism in (Fe,Cu)-codoped In ₂ O ₃ diluted magnetic oxide films An, Yukai; Xing, Yaya; Pan, Fei Physical Chemistry Chemical Physics, Vol. 18, Issue 19 https://doi.org/10.1039/c6cp01315e	journal	January 2016
Large As sublattice distortion in sphalerite ZnSnAs ₂ thin films revealed by x-ray fluorescence holography Hayashi, Kouichi; Uchitomi, Naotaka; Yamagami, Keitaro Journal of Applied Physics, Vol. 119, Issue 12 https://doi.org/10.1063/1.4945004	journal	March 2016
Local structure and atomic dynamics in ${Fe}_{2} VAl$ Heusler-type thermoelectric material: The effect of heavy element doping Kimura, K.; Yamamoto, K.; Hayashi, K. Physical Review B, Vol. 101, Issue 2 https://doi.org/10.1103/physrevb.101.024302	journal	January 2020
Multiple-wavelength neutron holography with pulsed neutrons Hayashi, Kouichi; Ohoyama, Kenji; Happo, Naohisa Science Advances, Vol. 3, Issue 8 https://doi.org/10.1126/sciadv.1700294	journal	August 2017

Similar Records

Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti_0.95Co_0.5O₂ film

Journal Article · Tue Jun 02 00:00:00 EDT 2015 · Applied Physics Letters · OSTI ID:22415102

Hu, Wen; Hayaski, Kouichi; Fukumura, Tomoteru; +8 more

Temperature dependent Raman scattering and far-infrared reflectance spectra of MgO modified Pb{sub 0.99}(Zr{sub 0.95}Ti{sub 0.05}){sub 0.98}Nb{sub 0.02}O{sub 3} ceramics: A composition effect

Journal Article · Sun Sep 07 00:00:00 EDT 2014 · Journal of Applied Physics · OSTI ID:22415102

Duan, Z. H.; Chang, P.; Chu, J. H.; +3 more

Room temperature multiferroic properties of (Bi{sub 0.95}La{sub 0.05})(Fe{sub 0.97}Mn{sub 0.03})O{sub 3}/NiFe{sub 2}O{sub 4} double layered thin film

Journal Article · Fri Nov 15 00:00:00 EST 2013 · Materials Research Bulletin · OSTI ID:22415102

Raghavan, C. M.; Kim, H. J.; Kim, J. W.

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT
COBALT OXIDES
CURIE POINT
DOPED MATERIALS
FERROMAGNETIC MATERIALS
FILMS
FINE STRUCTURE
PARAMAGNETISM
RUTILE
TITANIUM OXIDES
X-RAY FLUORESCENCE ANALYSIS

Title: Spontaneous formation of suboxidic coordination around Co in ferromagnetic rutile Ti{sub 0.95}Co{sub 0.05}O{sub 2} film

Citation Formats

References (29)

Cited By (8)

Similar Records

Related Subjects