The magnetism of ultrathin Ni films grown with O surfactant

被引：19

作者：

Sorg, C ^{[1
]}

Ponpandian, N ^{[1
]}

Scherz, A ^{[1
]}

Wende, H ^{[1
]}

Nünthel, R ^{[1
]}

Gleitsmann, T ^{[1
]}

Baberschke, K ^{[1
]}

机构：

[1] Free Univ Berlin, Inst Phys Expt, D-14195 Berlin, Germany

来源：

SURFACE SCIENCE | 2004年 / 565卷 / 2-3期

关键词：

magnetic films; X-ray absorption spectroscopy; magnetic measurements; nickel; oxygen; copper;

D O I：

10.1016/j.susc.2004.06.212

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Structural and magnetic properties of Ni films on Cu(I 0 0) and Cu(I 10) with and without 0 surfactant assisted growth are studied by element specific X-ray absorption spectroscopy (XAS) and X-ray magnetic circular dichroism (XMCD) at the 0 K edge and the Ni L-2,L-3 edges. No bulk-like NiO is formed at the surface, and 0 stays on top of the Ni films. We observe a charge transfer from Ni to 0 states at the surface. In contrast to Ni on (root2- x 2root2)R45degrees O/Cu(I 00) the total magnetization of Ni on (2 x 1) O/Cu(I 10) is enhanced for thinner Ni films. Especially, the orbital moment contributes to this enhancement. We attribute the effect to the surface roughness of the samples. Finally, we determine an induced magnetic orbital moment of the oxygen parallel to the spin and orbital moment of nickel. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：197 / 205

页数：9

共 35 条

[1] OK-edge x-ray magnetic circular dichroism of atomic O adsorbed on an ultrathin Co/Cu(100) film:: Comparison with molecular CO on Co/Cu(100) -: art. no. 132405 [J].

Amemiya, K ;

Yokoyama, T ;

Yonamoto, Y ;

Matsumura, D ;

Ohta, T .

PHYSICAL REVIEW B, 2001, 64 (13)

[2] 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

[3] MAGNETIC SURFACE ANISOTROPY OF A SPIN ARRAY [J].

CHANG, CR ;

CHIANG, YF .

PHYSICAL REVIEW B, 1993, 48 (17) :12783-12788

[4] SURFACTANTS IN EPITAXIAL-GROWTH [J].

COPEL, M ;

REUTER, MC ;

KAXIRAS, E ;

TROMP, RM .

PHYSICAL REVIEW LETTERS, 1989, 63 (06) :632-635

[5] Electronic and magnetic structure of thin Ni films on Co/Cu(001) [J].

Dhesi, SS ;

Dürr, HA ;

van der Laan, G ;

Dudzik, E ;

Brookes, NB .

PHYSICAL REVIEW B, 1999, 60 (18) :12852-12860

[6] THE ROLE OF ADSORBED GASES IN METAL ON METAL EPITAXY [J].

EGELHOFF, WF ;

STEIGERWALD, DA .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1989, 7 (03) :2167-2173

[7] Probing interfacial and bulk magnetic hysteresis in roughened CoFe thin films [J].

Freeland, JW ;

Bussmann, K ;

Lubitz, P ;

Idzerda, YU ;

Cao, CC .

APPLIED PHYSICS LETTERS, 1998, 73 (15) :2206-2208

[8] ROUGHNESS AND GIANT MAGNETORESISTANCE IN FE/CR SUPERLATTICES [J].

FULLERTON, EE ;

KELLY, DM ;

GUIMPEL, J ;

SCHULLER, IK ;

BRUYNSERAEDE, Y .

PHYSICAL REVIEW LETTERS, 1992, 68 (06) :859-862

[9] LOCAL-ORBITAL ANALYSIS OF THE OXYGEN NICKEL (001) BOND FROM SELF-CONSISTENT ELECTRONIC-STRUCTURE [J].

GODBY, RW ;

BENESH, GA ;

HAYDOCK, R ;

HEINE, V .

PHYSICAL REVIEW B, 1985, 32 (02) :655-661

[10] Crystallography of ultrathin iron, cobalt and nickel films grown epitaxially on copper [J].

Heinz, K ;

Müller, S ;

Hammer, L .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (48) :9437-9454

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