Tetragonal distortion of Mn films on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">Au</mml:mi><mml:mn /><mml:mo>(</mml:mo><mml:mn>100</mml:mn><mml:mo>)</mml:mo><mml:mn /></mml:math>

Schirmer, Birgitta; Feldmann, B.; Sokoll, A.; Gauthier, Yves; Wuttig, Matthias

doi:10.1103/physrevb.60.5895

Cited by 18 publications

(23 citation statements)

References 27 publications

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“…For this phase an interlayer spacing of 1.65 Å is expected, in excellent agreement with the result of our LEED analysis. 20 For this phase, the misfit to Cu 3 Au͑100͒ is with 7.7% quite large. Presumably, the increased atomic spacing in the iron films, which leads to the formation of superstructures, offers a mechanism to reduce the film stress.…”

Section: A Correlation Of Magnetism Structure and Morphologymentioning

confidence: 88%

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Magnetism, structure, and morphology of ultrathin Fe films onCu3Au(100)

Feldmann¹,

et al. 1998

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The magnetic, structural, and morphological properties of ultrathin Fe films on Cu 3 Au͑100͒ have been investigated by low-energy electron diffraction including I/V measurements, Auger electron spectroscopy, medium-energy electron diffraction, and magneto-optic Kerr effect. The main aim of these studies was to establish the correlation between film structure and magnetism. For this purpose both films deposited at 300 K ͑RT͒ and at 150 K ͑LT͒ followed by subsequent annealing to 300 K were investigated. Above about 1 monolayer ͑ML͒, the films exhibit a perpendicular magnetization, which switches at 3.2Ϯ0.2 ML for LT and 2.3Ϯ0.2 ML for RT films in-plane. The reduction of the switching thickness from perpendicular to in-plane with growth temperature is caused by an interdiffusion at the Fe film/substrate interface. At somewhat larger thickness a structural transition is observed. This structural transition is not related to the magnetic reorientation. Contrary to other studies no evidence is found for any fcc iron modification. We rather conclude that above 5 ML, the iron film transforms from strained to unstrained bcc͑100͒ Fe.

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Section: A Correlation Of Magnetism Structure and Morphologymentioning

confidence: 88%

“…The detailed procedure and the findings of this analysis will be presented elsewhere. 20 Here we will only summarize a subset of the information obtained that is relevant to understanding the correlation between magnetic and structural properties.…”

Section: Structurementioning

confidence: 99%

Magnetism, structure, and morphology of ultrathin Fe films onCu3Au(100)

Feldmann¹,

et al. 1998

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“…About 30 years ago, the ␥-phase bulk Mn samples were prepared by rapid quenching of Mn with dilute concentration of Cu, Ni, Pd, or Fe, revealing the AFM ordering with T N = 540 K. 2 However, since the last decade, the pure ␥and ␦-phase Mn films are prepared by epitaxial growth on single-crystalline substrates such as Cu͑100͒, [3][4][5] Fe͑100͒, 6 and Ag͑100͒, 7 etc. Due to the complexity and variety in the structure of Mn materials, the magnetic properties of Mn with different structures still attract many theoretical [8][9][10][11] and experimental 3,4,6,7,12,13 efforts up to now. In recent studies, 12,13 Mn ultrathin films grown on Cu 3 Au͑100͒ substrate at room temperature reveal the welldefined ␥-phase crystalline structure.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the crystalline structure, morphology, and magnetic properties ofγ-phaseMn∕Cu3Au(100)ultrathin films by varying

et al. 2007

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The structural and magnetic properties of room-temperature ͑RT: 300 K͒-grown and low-temperature ͑LT: 100 K͒-grown Mn/ Cu 3 Au͑100͒ thin films were investigated. Mn films deposited at RT and LT demonstrate very different behaviors in the crystalline structure, morphology, and magnetism. RT-Mn films reveal apparent layer-by-layer growth for 0 -2 ML ͑monolayer͒ followed by reduced oscillations. Although the medium-energy electron diffraction ͑MEED͒ oscillation is reduced, the intensity of specular spot increases monotonically after 6 -7 ML, inferring the tendency of smooth morphology. The study of scanning tunneling microscopy also shows that even in 19 ML Mn/ Cu 3 Au͑100͒, the surface morphology is composed of large terraces with the size up to hundreds of nanometers. The LT-Mn films reveal apparent layer-by-layer growth for 0 -5 ML followed by the reduced oscillations, and then the MEED intensity remains at low intensity, inferring the rough surface. The RT-and LT-Mn films exhibit a thickness-dependent structural transition from a face-centered cubic to a face-centered tetragonal structure at different critical thicknesses, ϳ12-14 and ϳ8 ML, respectively. Significant exchange bias is observed in Fe/ RT-Mn bilayers. It increases monotonously with Mn thickness. The exchange bias coupling in Fe/ LT-Mn is much weaker than Fe/ RT-Mn and drastically varies with Mn film thickness. The presence of exchange bias in the Fe/ Mn bilayers also indicates the antiferromagnetism of ␥-phase Mn/ Cu 3 Au͑100͒.

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“…Interestingly this phase can be stabilized until room temperature through the addition of a small amount of impurities 56 or as layerby-layer deposition on Cu 3 Au(100) 18,57 . Below the Neél temperature, about T N = 540 K the γ-phase acquires an anti-ferromagnetic ground-state, which is accompanied by tetragonal distortion into the fct structure 57,58 . From T = 1406 K up to the melting temperature T M = 1517 K there is a δ-phase, whose structure is bcc and order is antiferromagnetic.…”

Section: γ-Mnmentioning

confidence: 99%

Correlation effects in the total energy, the bulk modulus, and the lattice constant of a transition metal: Combined local-density approximation and dynamical mean-field theory applied to Ni and Mn

et al. 2009

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We present an accurate implementation of total energy calculations into the local density approximation plus dynamical mean-field theory (LDA+DMFT) method. The electronic structure problem is solved through the full potential linear Muffin-Tin Orbital (FP-LMTO) and KorringaKohn-Rostoker (FP-KKR) methods with a perturbative solver for the effective impurity suitable for moderately correlated systems. We have tested the method in detail for the case of Ni and investigated the sensitivity of the results to the computational scheme and to the complete self-consistency. It is demonstrated that the LDA+DMFT method can resolve a long-standing controversy between the LDA/GGA density functional approach and experiment for equilibrium lattice constant and bulk modulus of Mn.

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Tetragonal distortion of Mn films onCu3Au(100)

Cited by 18 publications

References 27 publications

Magnetism, structure, and morphology of ultrathin Fe films onCu3Au(100)

Magnetism, structure, and morphology of ultrathin Fe films onCu3Au(100)

Comparison of the crystalline structure, morphology, and magnetic properties ofγ-phaseMn∕Cu3Au(100)ultrathin films by varying

Correlation effects in the total energy, the bulk modulus, and the lattice constant of a transition metal: Combined local-density approximation and dynamical mean-field theory applied to Ni and Mn

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