On the origin of ferromagnetism in semiconducting TiO2-δ:: Co oxide

被引：16

作者：

Balagurov, LA ^{[1
]}

Klimonsky, SO

Kobeleva, SP

Orlov, AF

Perov, NS

Yarkin, DG

机构：

[1] State Res Inst Rare Met Ind Giredmet, Moscow 119017, Russia

[2] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

来源：

JETP LETTERS | 2004年 / 79卷 / 02期

关键词：

D O I：

10.1134/1.1690360

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In Co-doped TiO2 - delta oxide films deposited on SrTiO3(100) substrates, a room-temperature ferromagnetism is found to occur only in a limited charge-carrier concentration interval from 2 x 10(18)-5 x 10(22) cm(-3). This indirectly testifies that ferromagnetism in the aforementioned n-type semiconductor is associated with the exchange interaction of magnetic ions via conduction electrons rather than with the formation of Co clusters in the material. The magnetic moment per Co atom is 0.87mu(B) in the TiO cubic phase and 0.57mu(B) in the anatase tetragonal phase of TiO2. (C) 2004 MAIK "Nauka / Interperiodica".

引用

页码：98 / 99

页数：2

共 10 条

[1]

Chambers S. A., 2002, Mater. Today, V5, P34, DOI [10.1016/S1369-7021(02)05423-8, DOI 10.1016/S1369-7021(02)05423-8]

[2] Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase [J].

Chambers, SA ;

Thevuthasan, S ;

Farrow, RFC ;

Marks, RF ;

Thiele, JU ;

Folks, L ;

Samant, MG ;

Kellock, AJ ;

Ruzycki, N ;

Ederer, DL ;

Diebold, U .

APPLIED PHYSICS LETTERS, 2001, 79 (21) :3467-3469

[3] Clusters and magnetism in epitaxial Co-doped TiO2 anatase [J].

Chambers, SA ;

Droubay, T ;

Wang, CM ;

Lea, AS ;

Farrow, RFC ;

Folks, L ;

Deline, V ;

Anders, S .

APPLIED PHYSICS LETTERS, 2003, 82 (08) :1257-1259

[4] Magneto-optical spectroscopy of anatase TiO2 doped with Co [J].

Fukumura, T ;

Yamada, Y ;

Tamura, K ;

Nakajima, K ;

Aoyama, T ;

Tsukazaki, A ;

Sumiya, M ;

Fuke, S ;

Segawa, Y ;

Chikyow, T ;

Hasegawa, T ;

Koinuma, H ;

Kawasaki, M .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 2003, 42 (2A) :L105-L107

[5] Ferromagnetism induced by clustered Co in Co-doped anatase TiO2 thin films -: art. no. 017401 [J].

Kim, JY ;

Park, JH ;

Park, BG ;

Noh, HJ ;

Oh, SJ ;

Yang, JS ;

Kim, DH ;

Bu, SD ;

Noh, TW ;

Lin, HJ ;

Hsieh, HH ;

Chen, CT .

PHYSICAL REVIEW LETTERS, 2003, 90 (01)

[6] Room-temperature ferromagnetism in transparent transition metal-doped titanium dioxide [J].

Matsumoto, Y ;

Murakami, M ;

Shono, T ;

Hasegawa, T ;

Fukumura, T ;

Kawasaki, M ;

Ahmet, P ;

Chikyow, T ;

Koshihara, S ;

Koinuma, H .

SCIENCE, 2001, 291 (5505) :854-856

[7] Semiconducting and ferromagnetic behavior of sputtered Co-doped TiO2 thin films above room temperature [J].

Park, WK ;

Ortega-Hertogs, RJ ;

Moodera, JS ;

Punnoose, A ;

Seehra, MS .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (10) :8093-8095

[8] On the room temperature ferromagnetism in Co-doped TiO2 films [J].

Punnoose, A ;

Seehra, MS ;

Park, WK ;

Moodera, JS .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7867-7869

[9]

SIMPSON JR, 2002, CONDMAT0205626

[10] Investigation of the cobalt distribution in the room temperature ferromagnet TiO2:Co [J].

Stampe, PA ;

Kennedy, RJ ;

Xin, Y ;

Parker, JS .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7864-7866

← 1 →