Magnetic and structural instabilities of ferromagnetic and antiferromagnetic Fe/Cu(100)
Magnetic and structural instabilities of ferromagnetic and antiferromagnetic Fe/Cu(100)
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铁磁和反铁磁 Fe/Cu(100) 的磁性和结构不稳定性
DOI：
10.1063/1.358284
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发表时间：
1994
影响因子：
3.2
通讯作者：
S. Bader
中科院分区：
文献类型：
--
作者：
Dongqi Li;M. Freitag;J. Pearson;Z. Qiu;S. Bader
用外延生长在Cu（100）上的Fe楔研究了磁不稳定性和结构不稳定性之间的相互作用。2-4在室温下生长的单层（ML）清洁Fe膜是具有垂直易磁化轴的铁磁性。bcc Fe膜厚度为11 ML，具有面内易磁化轴的铁磁性。最重要的是，6-11 ML fcc Fe膜是反铁磁的，并且具有铁磁表面。在200 K以下生长并退火至室温的薄膜不显示反铁磁相，但仍保持铁磁，并在106 ML下经历从垂直到平面内的自旋重取向转变。提出了Fe/Cu（100）相图随厚度和生长温度的变化关系。此外，还报道了持续到30-40 ML Fe的杂质稳定的逐层生长。
Fe wedges epitaxially grown on Cu(100) have been employed to investigate the interplay between magnetic and structural instabilities. 2–4 monolayer (ML) clean Fe films grown at room temperature are ferromagnetic with perpendicular easy axes. bcc Fe films≳11 ML thick are ferromagnetic with in‐plane easy axes. Most importantly, 6–11 ML fcc Fe films are antiferromagnetic and have a ferromagnetic surface. Films grown below 200 K and annealed to room temperature do not exhibit the antiferromagnetic phase, but remain ferromagnetic and undergo a spin‐reorientation transition from perpendicular to in plane at ∼6 ML. A new phase diagram for Fe/Cu(100) is proposed as a function of thickness and growth temperature. In addition, an impurity‐stabilized layer‐by‐layer growth that persists to 30–40 ML Fe is also reported.