Co-Ir interface alloying induced by thermal annealing

被引：16

作者：

Carlomagno, I. ^{[1
,2
]}

Drnec, J. ^{[1
]}

Scaparro, A. M. ^{[2
]}

Cicia, S. ^{[2
]}

Vlaic, S. ^{[3
]}

Felici, R. ^{[4
]}

Meneghini, C. ^{[2
]}

机构：

[1] ESRF, 71 Ave Martyrs, Grenoble, France

[2] Univ Rome Tre, Dipartimento Sci, Via Vasca Navale 84, Rome, Italy

[3] PSL Res Univ, ESPCI Paris, CNRS, LPEM, 10 Rue Vauquelin, Paris, France

[4] CNR SPIN, Area Ric Tor Vergata, Via Fosso del Cavaliere 100, Rome, Italy

来源：

JOURNAL OF APPLIED PHYSICS | 2016年 / 120卷 / 19期

关键词：

MAGNETIC TUNNEL-JUNCTION; MAGNETOCRYSTALLINE ANISOTROPY; ULTRATHIN FILMS; INTERCALATION; COBALT; EXAFS;

D O I：

10.1063/1.4967845

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using angular resolved X-ray Photoelectron Spectroscopy (XPS), Magneto Optic Kerr Effect (MOKE) and X-ray Absorption Spectroscopy (XAS), we characterize the structural and magnetic evolution upon annealing of two thin Co films (8 and 9 Monolayers) deposited on Ir(111). The XAS data collected in the near Co K edge region (XANES), interpreted with ab-initio simulations, show that intermixing takes place at the Co-Ir interface. Using a linear combination analysis, we follow the intermixing during the thermally driven diffusion process. At 500 degrees C, the interface between Co and Ir(111) roughens slightly, but no alloy formation is detected. At 600 degrees C, the Co film loses integrity and MOKE data show a rearrangement of the magnetic domains. Annealing to higher temperatures results in CoxIr1-x alloy formation and Ir segregation on the surface. Published by AIP Publishing.

引用

页数：7

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