<Publication Lists>

Journal papers: (*corresponding author)

01. T. C. Han*, Y. D. Chung, and Y. C. Lee, "Enhancement of multiferroic and magnetocapacitive properties in nanicrystalline Mg-doped GaFeO₃", J. Alloys Compd. 692, 569 (2017), [SCI] (supported by MOST 102-2112-M-390-003-MY3 and 105-2112-M-390-001)

02. Y. M. Hu*, J. Y. Li, N. Y. Chen, C. Y. Chen, T. C. Han, and C. C. Yu, "Correlation between defect-related photoluminescence emission and anomalous Raman peaks in N-Al co-doped ZnO thin films", Appl. Phys. Lett. 110, 141903 (2017), [SCI] (supported by MOST 104-2112-M-390-003)

03. Y. M. Hu*, J. Y. Li, N. Y. Chen, C. Y. Chen, T. C. Han and C. C. Yu, "Effect of sputtering power on crystallinity, intrinsic defects, and optical and electrical properties of Al-doped ZnO transparent conducting thin films for optoelectronic devices", J. Appl. Phys. 121, 085302 (2017), [SCI] (supported by MOST 104-2112-M-390-003)

04. T. C. Han*, H. K. Hsu, Y. T. Chu, and Y. M. Hu, "Grain size effect on magnetic and dielectric properties of hexagonal YbMnO₃ nanoparticles", J. Appl. Phys. 117, 17D501 (2015), [SCI] (supported by MOST 102-2112-M-390-003-MY3)

05. Y. M. Hu*, S. S. Li, C. H. Kuang, T. C. Han, and C. C. Yu, "Post-annealing effect on the room-temperature ferromagnetism in Cu-doped ZnO thin films", J. Appl. Phys. 117, 17B901 (2015), [SCI] (supported by MOST 101-2112-M-390-002-MY3)

06. T. C. Han*, S. S. Pan, and Y. H. Liu, "Enhancement of multiferroic properties in Y-doped Co₂MnO₄ spinel", J. Appl. Phys. 116, 244104 (2014), [SCI] (supported by MOST 99-2112-M-390-005-MY3 and 102-2112-M-390-003-MY3)

07. T. C. Han*, Y. C. Lee, and Y. T. Chu, "Effect of cobalt doping on site-disorder and magnetic behavior of magnetoelectric GaFeO₃ nanoparticles", Appl. Phys. Lett. 105, 212407 (2014), [SCI] (supported by MOST 102-2112-M-390-003-MY3)

08. T. C. Han*, I. C. Wu, and H. K. Hsu, "Effects of Cr doping on the magnetic properties of multiferroic YMnO₃", J. Appl. Phys. 115, 17D906 (2014), [SCI] (supported by MOST 99-2112-M-390-005-MY3 and 102-2112-M-390-003-MY3)

09. T. C. Han*, T. Y. Chen, and Y. C. Lee, "Grain size effect on site-disorder and magnetic properties of multiferroic GaFeO₃ nanoparticles", Appl. Phys. Lett. 103, 232405 (2013), [SCI] (supported by MOST 102-2112-M-390-003-MY3)

10. T. C. Han* and J. G. Lin, "Exchange bias between multiferroic HoMnO₃ and ferromagnetic SrRuO₃ films", J. Appl. Phys. 113, 17D718 (2013), [SCI] (supported by MOST 99-2112-M-390-005-MY3)

11. T. C. Han*, C. T. Chen, S. S. Pan, and J. G. Lin, "Heterojunction of multiferroic HoMnO₃ on Nb-doped SrTiO₃", J. Appl. Phys. 113, 17C709 (2013), [SCI] (supported by MOST 99-2112-M-390-005-MY3)

12. T. C. Han*, J. W. Chen, Y. H. Liu, and Y. M. Hu, "Grain size effect on magnetic and electric properties of LuMnO₃ nanocrystalline materials", J. Appl. Phys. 113, 17B507 (2013), [SCI] (supported by MOST 99-2112-M-390-005-MY3)

13. T. C. Han*, P. J. Wu and Y. L. Shih, "Correlation between magnetic ordering and electric polarization in YMn_1-xFe_xO₃ nanocrystalline materials", J. Appl. Phys. 111, 07B511 (2012), [SCI] (supported by NSC 99-2112-M-390-005-MY3)

14. Y. H. Tang, T. C. Han, H. L. Liu and J. G. Lin, "Doping effects on the magnetoelectricity of bismuth ferrite nanoparticles", J. Supercond. Nov. Magn. 25, 2753 (2012), [SCI] (supported by NSC 96-2112-M-002-027-MY3)

15. Y. C. Lin*, C. L. Tseng, W. C. Chou*, C. H. Chia, T. C. Han and J. L. Shen, "Lattice dynamics and crystalline properties of wurtzite Zn_1-xMg_xO powders under high pressure", J. Phys. Chem. C 115, 19962 (2011), [SCI] (supported by NSC 99-2119-M-009-002)

16. T. C. Han*, W. L. Hsu and W. D. Lee, "Grain size-dependent magnetic and electric properties in nanosized YMnO₃ multiferroic ceramics", Nanoscale Res. Lett. 6, 201 (2011), [SCI] (supported by NSC 96-2112-M-390-003-MY3 and 98-2815-C-390-015-M)

17. T. C. Han*, M. R. Tsai and C. Y. Wei, "Size effect on magnetic properties of hexagonal HoMnO₃ nanoparticles", J. Appl. Phys. 109, 07B517 (2011), [SCI] (supported by NSC 96-2112-M-390-003-MY3 and 99-2112-M-390-005-MY3)

18. C. H. Chia*, J. N. Chen, T. C. Han, J. W. Chiou, Y. C. Lin, W. L. Hsu and W. C. Chou, "Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders", J. Appl. Phys. 109, 063526 (2011), [SCI] (supported by NSC 99-2112-M-390-001-MY3)

19. Y. M. Hu*, C. Y. Wang, S. S. Lee, T. C. Han, W. Y. Chou and G. J. Chen, "Identification of Mn-related raman modes in Mn-doped ZnO thin films", J. Raman Spectroscopy 42, 434 (2011), [SCI] (supported by NSC 98-2112-M-390-002)

20. T. C. Han* and H. H. Chao, "Observation of large electric polarization in orthorhombic TmMnO₃ thin films", Appl. Phys. Lett. 97, 232902 (2010), [SCI] (supported by NSC 96-2112-M-390-003-MY3 and 99-2112-M-390-005-MY3)

21. Y. M. Hu*, C. Y. Wang, S. S. Lee, T. C. Han and W. Y. Chou, "Raman scattering studies of Mn-doped ZnO thin films deposited under pure Ar or Ar+N₂ sputtering atmosphere", Thin Solid Films 519, 1272 (2010), [SCI] (supported by NSC 98-2112-M-390-002)

22. C. H. Chia*, Y. J. Lai, W. L. Hsu, T. C. Han, J. W. Chiou, Y. M. Hu, Y. C. Lin, W. C. Fan and W. C. Chou, "Biexciton emission from sol-gel ZnMgO nanopowders", Appl. Phys. Lett. 96, 191902 (2010), [SCI] (supported by NSC 97-2112-M-390-001-MY3)

23. C. H. Chia*, Y. J. Lai, T. C. Han, J. W. Chiou, Y. M. Hu and W. C. Chou, "High-excitation effect on photoluminescence of sol-gel ZnO nanopowder", Appl. Phys. Lett. 96, 081903 (2010), [SCI] (supported by NSC 97-2112-M-390-001-MY3)

24. T. C. Han*, J. G. Lin, C. T. Wu, M. –W. Chu and C. H. Chen, "Substrate dependent growth of HoMnO₃ films", Jpn. J. Appl. Phys. 49, 041501 (2010), [SCI] (supported by NSC 95-2752-M-002-006-PAE, 96-2112-M-390-003-MY3 and 96-2112-M-002-027-MY3)

25. J. G. Lin, Y. S. Chen and T. C. Han*, "Correlation of magnetic ordering and electric polarization in multiferroic LuMn_1-xFe_xO₃ (0 ≤ x ≤ 0.2)", J. Appl. Phys. 107, 09D902 (2010), [SCI] (supported by NSC 96-2112-M-390-003-MY3 and 96-2112-M-002-027-MY3)

26. Y. M. Hu*, C. W. Hsu, C. Y. Wang, J. W. Chiou, T. C. Han, G. J. Chen, W. Y. Chou and J. Chang, "Formation and identification ofsecondary oxide phases in co-sputtered ZnO:Cr films", Thin Solid Films 518, 2916 (2010), [SCI] (supported by NSC 97-2112-M-390-005)

27. T. C. Han* and J. G. Lin, "Multiferroic properties of hexagonal YbMnO₃ thin films", IEEE Trans. Magn. 45, 4265 (2009), [SCI] (supported by NSC 96-2112-M-390-003-MY3 and 96-2112-M-002-027-MY3)

28. T. C. Han* and J. G. Lin, "Strong coupling of magnetic and dielectric properties in the a-axis-oriented orthorhombic HoMnO₃ films", Appl. Phys. Lett. 94, 082502 (2009), [SCI] (supported by NSC 96-2112-M-390-003-MY3 and 96-2112-M-002-027-MY3)

29. R. Nithya, V. Sankara Sastry, P. Paul, T. C. Han, J. G. Lin and F. C. Chou*, "Effect of hole doping and antiferromagnetic coupling on the itinerant ferromagnetism of SrRuO₃ through Cu substitution at Ru site", Solid State Commun. 149, 1674 (2009), [SCI] (supported by NSC 96-2120-M-002-002 and 96-2752-M-002-006-PAE)

30. Y. M. Hu*, C. W. Hsu, C. Y. Wang, S. S. Lee, S. J. Wang, T. C. Han and W. Y. Chou, "Room-temperature ferromagnetism in co-sputtered Zn_1-xCr_xO films with low Cr content", Scripta Materialia 61, 1028 (2009), [SCI] (supported by NSC 97-2112-M-390-005)

31. M. C. Lin, Y. S. Chen, T. C. Han, J. G. Lin* and C. H. Chen, "Origin of R-dependent dielectric anomalies in RMnO₃ with R = Y, Ho, Er, Tm, Yb and Lu", Ferroelectrics 380, 38 (2009), [SCI] (supported by NSC 95-2112-M-002-008 and 95-2752-M-002-006-PAE)

32. Y. M. Hu*, J. W. Chiou, T. C. Han, Y. T. Chen, C. W. Hsu, G. J. Chen, W. Y. Chou, J. Chang, J. Y. Hsu and Y. C. Yu, "Structural and morphological evolution in magnetron co-sputtered (Zn,Cr)O films", J. Phys. D: Appl. Phys. 41, 205301 (2008), [SCI] (supported by NSC 96-2112-M-390-002)

33. R. Nithya, B. X. Xie, J. G. Lin*, F. C. Chou and T. C. Han, "Evolution of magnetic correlations in single crystalline La_1.2Sr_1.8Mn₂O₇", J. Appl. Phys. 104, 063913 (2008), [SCI] (supported by NSC 96-2112-M-002-027-MY3)

34. T. C. Han* and J. G. Lin, "Substrate dependent structure and magnetic properties in HoMnO₃ films", IEEE Trans. Magn. 44, 2930 (2008), [SCI] (supported by NSC 95-2752-M-002-006-PAE, 96-2112-M-390-003-MY3 and 96-2112-M-002-027-MY3)

35. J. G. Lin*, T. C. Han, C. –T. Wu, M. –W. Chu and C. H. Chen, "Directional growth and characterizations of orthorhombic HoMnO₃ films", J. Cryst. Growth 310, 3878 (2008), [SCI] (supported by NSC 95-2752-M-002-006-PAE, 96-2112-M-002-027-MY3 and 96-2112-M-390-003-MY3)

36. T. C. Han, J. G. Lin*, K. M. Kuo and G. Chern, "Large dielectric permittivity in the paraelectric RMn₂O₅ with R = Tb, Dy, and Er", J. Appl. Phys. 103, 084106 (2008), [SCI] (supported by NSC 95-2120-M-002-002 and 95-2752-M-002-006-PAE)

<Research Proposal>

1. Research Specialty:

Magnetoelectric Materials, Thin Film Physics, Magnetic Physics (experimental)

2. Research Interests:

Our laboratory focuses on studying the magnetic, dielectric and magnetoelectric properties of metal oxides including bulk and nanoscale materials and the new developed multiferroics. The recent research topics include:

(1). Magnetoelectric Materials:

Synthesis and develop multifunctional magnetoelectric materials and study the coupling between magnetic and electric orderings.

(2). Ceramic Materials:

Study the size effects on the physical properties (magnetic, ferroelectric, and dielectric properties) of ceramic oxides.

(3). Fabrication of complex oxide nanostructures and heterostructures for next generation devices.

<Lab. details>

Magnetronic Materials Lab.

Location: Room 515-1, College of Science

Equipments: Our research focuses on fabrication of metal oxides and studies their physical properties.

(1). Sol-gel and solid-state reaction methods are used to synthesize complex oxides.

(2). Using LCR-Meter (Agilent E4980A) to probe the dielectric relaxation in multiferroic materials.

Main facilities: