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Chin. Phys. B, 2016, Vol. 25(11): 116103    DOI: 10.1088/1674-1056/25/11/116103

Effect of Ar ion irradiation on the room temperature ferromagnetism of undoped and Cu-doped rutile TiO2 single crystals

Nan-Nan Xu(许楠楠)1, Gong-Ping Li(李公平)1,2, Qiao-Lu Lin(林俏露)1, Huan Liu(刘欢)1, Liang-Man Bao(包良满)3
1 School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China;
2 State Key Laboratory of Crystal Material, Shandong University, Jinan 250001, China;
3 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

Remarkable room-temperature ferromagnetism was observed both in undoped and Cu-doped rutile TiO2 single crystals (SCs). To tune their magnetism, Ar ion irradiation was quantitatively performed on the two crystals in which the saturation magnetizations for the samples were enhanced distinctively. The post-irradiation led to a spongelike layer in the near surface of the Cu-doped TiO2. Meanwhile, a new CuO-like species present in the sample was found to be dissolved after the post-irradiation. Analyzing the magnetization data unambiguously reveals that the experimentally observed ferromagnetism is related to the intrinsic defects rather than the exotic Cu ions, while these ions are directly involved in boosting the absorption in the visible region.

Keywords:  single-crystal TiO2      Cu ion implantation      Ar ion irradiation/post-irradiation      room-temperature ferromagnetism  
Received:  12 June 2016      Revised:  08 July 2016      Published:  05 November 2016
PACS:  61.80.-x (Physical radiation effects, radiation damage)  
  61.72.-y (Defects and impurities in crystals; microstructure)  
  75.50.-y (Studies of specific magnetic materials)  

Project supported by the National Natural Science Foundation of China (Grant No. 11575074), the Open Project of State Key laboratory of Crystal Material, Shandong University, China (Grant No. KF1311), the Open Project of Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, China (Grant No. LZUMMM2012003), the Open Project of Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, China (Grant No. 201204), and the Fundamental Research Funds for the Central Universities, China (Grant No. lzujbky-2015-240).

Corresponding Authors:  Gong-Ping Li     E-mail:

Cite this article: 

Nan-Nan Xu(许楠楠), Gong-Ping Li(李公平), Qiao-Lu Lin(林俏露), Huan Liu(刘欢), Liang-Man Bao(包良满) Effect of Ar ion irradiation on the room temperature ferromagnetism of undoped and Cu-doped rutile TiO2 single crystals 2016 Chin. Phys. B 25 116103

[1] Matsumoto Y, Murakami M, Shono T, Hasegawa T, Fukumura T, Kawasaki M, Ahmet P, Chikyow T, Koshihara S Y and Koinuma H 2001 Science 291 854
[2] Carp O, Huisman C L and Reller A 2004 Prog. Solid State Chem. 32 33
[3] Ni M, Leung M K H, Leung D Y C and Sumathy K 2007 Renew. Sust. Energ. Rev. 11 401
[4] Wolf S A, Awschalom D D, Buhrman R A, Daughton J M, von Molnár S, Roukes M L, Chtchelkanova A Y and Treger D M 2001 Science 294 1488
[5] Kim J Y, Park J H, Park B G, Noh H J, Oh S J, Yang J S, Kim D H, Bu S D, Noh T W, Lin H J, Hsieh H H and Chen C T 2003 Phys. Rev. Lett. 90 017401
[6] Toyosaki H, Fukumura T, Yamada Y, Nakajima K, Chikyow T, Hasegawa T, Koinuma H and Kawasaki M 2004 Nat. Mater. 3 221
[7] Hong N H, Sakai J, Prellier W and Hassini A 2003 Appl. Phys. Lett. 83 3129
[8] Zhao Y L, Motapothula M, Yakovlev N L, Liu Z Q, Dhar S, Rusydi A, Breese M B H, Wang Q and Venkatesan T 2012 Appl. Phys. Lett. 101 142105
[9] Duhalde S, Vignolo M F, Golmar F, Chiliotte C, Torres C E R, Errico L A, Cabrera A F, Rentería M, Sánchez F H and Weissmann M 2005 Phys. Rev. B 72 161313
[10] Torres C E R, Golmar F, Cabrera A F, Errico L, Navarro A M M, Rentería M, Sánchez F H and Duhalde S 2007 Appl. Surf. Sci. 254 365
[11] Hou D L, Zhao R B, Meng H J, Jia L Y, Ye X J, Zhou H J and Li X L 2008 Thin Solid Films 516 3223
[12] Sangaletti L, Mozzati M C, Galinetto P, Azzoni C B, Speghini A, Bettinelli M and Calestani G 2006 J. Phys.:Condens. Matter 18 7643
[13] Venkatesan M, Fitzgerald C B and Coey J M D 2004 Nature 430 630
[14] Coey J M D, Venkatesan M, Stamenov P, Fitzgerald C B and Dorneles L S 2005 Phys. Rev. B 72 024450
[15] Hong N H, Sakai J, Poirot N and Brizé V 2006 Phys. Rev. B 73 132404
[16] Zhao Q, Wu P, Li B L, Lu Z M and Jiang E Y 2008 J. Appl. Phys. 104 073911
[17] Coey J M D, Venkatesan M and Fitzgerald C B 2005 Nat. Mater. 4 173
[18] Townsend P D 1987 Rep. Prog. Phys. 50 501
[19] Tuomisto F and Makkonen I 2013 Rev. Mod. Phys. 85 1583
[20] Schultz P J and Lynn K G 1988 Rev. Mod. Phys. 60 701
[21] Valeeva A A, Rempel A A, Sprengel W and Schaefer H E 2007 Phys. Rev. B 75 094107
[22] Porto S P S, Fleury P A and Damen T C 1967 Phys. Rev. 154 522
[23] Swamy V, Muddle B C and Dai Q 2006 Appl. Phys. Lett. 89 163118
[24] Balachandran U and Eror N G 1982 J. Solid State Chem. 42 276
[25] Lu T C, Lin L B, Wu S Y, Zhao C P, Xu X C and Tian Y F 2002 Nucl. Instrum. Methods Phys. Res. B 191 291
[26] Zhou S, Čižmár E, Potzger K, Krause M, Talut G, Helm M, Fassbender J, Zvyagin S A, Wosnitza J and Schmidt H 2009 Phys. Rev. B 79 113201
[27] Zhao X H, Wang P and Li B J 2010 Chem. Commun. 46 6768
[28] Xin B, Wang P, Ding D, Liu J, Ren Z and Fu H 2008 Appl. Surf. Sci. 254 2569
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