fcc-bcc phase transition of epitaxial Fe/Cu(111) films: a structural and magnetic study

被引：15

作者：

Gubbiotti, G

Albini, L

Carlotti, G

Loreti, S

Minarini, C

De Crescenzi, M

机构：

[1] CR ENEA, I-80055 Portici Napoli, Italy

[2] Univ Perugia, Ist Nazl Fis Mat, Dipartimento Fis, I-06100 Perugia, Italy

[3] Univ Camerino, Ist Nazl Fis Mat, Dipartimento Matemat & Fis, I-62032 Camerino, Italy

来源：

SURFACE SCIENCE | 1999年 / 433卷

关键词：

epitaxy; iron; low energy electron diffraction; magnetic properties and measurements; magnetic structures; X-ray diffraction;

D O I：

10.1016/S0039-6028(99)00532-4

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：

Epitaxial Cu/Fe/Cu trilayers with Fe film thickness between 4 and 110 Angstrom have been deposited on the 7 x 7 reconstructed surface of Si(111) single crystal. The structural and chemical characterization of Fe films was accomplished by in situ low energy electron diffraction, Kikuchi electron diffraction and Auger electron spectroscopy. As the Fe thickness exceeds about 6-8 Angstrom. a fcc-bcc phase transition occurs by the appearance of bcc(110) domains in the Kurdjumov-Sachs orientation. The structural transformation is also confirmed by ex situ X-ray diffraction experiments in the theta-2 theta configuration. The evolution of the magnetic properties with the Fe film thickness has been studied by means of surface magneto-optic Kerr effect. Hysteresis loops measurements in the longitudinal configuration show a marked increase of the saturation signal which can be associated with the structural fcc-bce phase transition of Fe. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：680 / 684

页数：5

共 14 条

[1]

ALBINI L, 1998, THESIS U PERUGIA

[2]

CLARKE A, 1987, SURF SCI, V192, pL843, DOI 10.1016/S0039-6028(87)81155-X

[3] STRUCTURAL REFINEMENT OF SUPERLATTICES FROM X-RAY-DIFFRACTION [J].

FULLERTON, EE ;

SCHULLER, IK ;

VANDERSTRAETEN, H ;

BRUYNSERAEDE, Y .

PHYSICAL REVIEW B, 1992, 45 (16) :9292-9310

[4] Perpendicular and in-plane magnetic anisotropy in epitaxial Cu/Ni/Cu/Si(111) ultrathin films [J].

Gubbiotti, G ;

Carlotti, G ;

Socino, G ;

DOrazio, F ;

Lucari, F ;

Bernardini, R ;

DeCrescenzi, M .

PHYSICAL REVIEW B, 1997, 56 (17) :11073-11083

[5]

GUBBIOTTI G, 1999, IN PRESS SURF SCI

[6] Molecular-dynamics study of thin iron films on copper [J].

Kadau, K ;

Meyer, R ;

Entel, P .

SURFACE REVIEW AND LETTERS, 1999, 6 (01) :35-43

[7] MAGNETIC-PROPERTIES OF FERROMAGNETIC GAMMA-FE FILMS ON CU (111) [J].

KUMMERLE, W ;

GRADMANN, U .

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 1978, 45 (01) :171-180

[8] FERROMAGNETISM IN GAMMA-IRON [J].

KUMMERLE, W ;

GRADMANN, U .

SOLID STATE COMMUNICATIONS, 1977, 24 (01) :33-35

[9] NEW CLASS OF LAYERED MATERIALS [J].

SCHULLER, IK .

PHYSICAL REVIEW LETTERS, 1980, 44 (24) :1597-1600

[10] CUMULATIVE DISORDER AND X-RAY-LINE BROADENING IN MULTILAYERS [J].

SEVENHANS, W ;

GIJS, M ;

BRUYNSERAEDE, Y ;

HOMMA, H ;

SCHULLER, IK .

PHYSICAL REVIEW B, 1986, 34 (08) :5955-5958

← 1 2 →