Growth of thin Mn films on W(110) studied by means of in-situ scanning tunnelling microscopy

Bode, Matthias; Hennefarth, Matthew R.; Haude, D.; Getzlaff, M.; Wiesendanger, R.

doi:10.1016/s0039-6028(99)00447-1

Cited by 24 publications

(18 citation statements)

References 22 publications

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“…15,16 The epitaxial relationship is maintained up to a coverage of about 3 ML but in contrast to Fe/W͑110͒, already the first Mn layer exhibits a modest growth anisotropy in the ͗001͘ direction. 15 These results were analyzed in the framework of the densityfunctional theory ͑DFT͒ ͑Ref. 17͒ and in good agreement with experiments, pseudomorphic growth of Mn films with a c͑2 ϫ 2͒ in-plane antiferromagnetic order up to three monolayers was found.…”

Section: Introductionmentioning

confidence: 99%

Preparation and photoemission investigation of bulklikeα-Mnfilms on W(110)

2010

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We report the successful stabilization of a thick bulklike distorted ␣-Mn film with ͑110͒ orientation on a W͑110͒ substrate. The observed ͑3 ϫ 3͒ overstructure for the Mn film with respect to the original W͑110͒ low-energy electron-diffraction pattern is consistent with the presented structure model. The possibility to stabilize such a pseudomorphic Mn film is supported by density-functional total-energy calculations. Angleresolved photoemission spectra of the stabilized ␣-Mn͑110͒ film show weak dispersions of the valence-band electronic states in accordance with the large unit cell.

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Section: Introductionmentioning

confidence: 99%

Preparation and photoemission investigation of bulklikeα-Mnfilms on W(110)

2010

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“…17 Indeed, a recent scanning tunneling microscopy ͑STM͒ study revealed that up to a local coverage of three atomic layers Mn grows pseudomorphically on W͑110͒. 18 The drawback is the strong hybridization of the 3d monolayer with such a 5d substrate, influencing the magnetic properties. As a consequence, the 3d bands of the transition-metal broaden.…”

Section: Introductionmentioning

confidence: 99%

Structural, electronic, and magnetic properties of a Mn monolayer on W(110)

et al. 2002

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In this paper we establish a monolayer of Mn on W͑110͒ as a model system for two-dimensional itinerant antiferromagnetism. Combining scanning tunneling microscopy ͑STM͒, low-energy electron diffraction, and ab initio calculations performed with the full-potential linearized augmented plane wave method we have studied the structural, electronic, and magnetic properties of a Mn monolayer on W͑110͒. Our experimental results indicate that in spite of the huge tensile strain Mn grows pseudomorphically on W͑110͒ up to a thickness of three monolayers. Intermixing between the Mn overlayer and the W substrate can be excluded. Using these structural data as a starting point for the ab initio calculations of one monolayer Mn on W͑110͒ we conclude that ͑i͒ Mn is magnetic and exhibits a large magnetic moment of 3.32 B , ͑ii͒ the magnetic moments are arranged in a c(2ϫ2) antiferromagnetic order, ͑iii͒ the easy axis of the magnetization is in plane and points along the ͓11 0͔ direction, i.e., the direction along the long side of the ͑110͒ surface unit cell with a magnetocrystalline anisotropy energy of 1.3-1.5 meV, and ͑iv͒ the Mn-W interlayer distance is 2.14 Å. The calculated electronic structure of a Mn monolayer on W͑110͒ is compared with experimental scanning tunneling spectroscopy results. Several aspects are in nice agreement, but one cannot unambiguously deduce the magnetic structure from such a comparison. The proposed two-dimensional antiferromagnetic ground state of a Mn monolayer on W͑110͒ is directly verified by the use of spin-polarized STM ͑SP-STM͒ in the constant-current mode, and an in-plane easy magnetization axis could be confirmed using tips with different magnetization directions. We compare the measurements with theoretically determined SP-STM images calculated combining the Tersoff-Hamann model extended to SP-STM with the ab initio calculation, resulting in good agreement.

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“…[21][22][23][24][25][26][27][28] Mn-films grown at low temperature on the surfaces of noble and late transition metals show a tetragonally expanded fct structure close to ␥-Mn, c͑2 ϫ 2͒ in-plane antiferromagnetism ͑AF͒ in the monolayer limit and layered AF in thicker films, high-temperature deposition or annealing leads to interdiffusion and the formation of c͑2 ϫ 2͒ surface alloys. 17,18 Surface alloying and a ferromagnetic coupling between the Mn atoms in the alloy layer are in good agreement with ab initio calculations.…”

Section: Introductionmentioning

confidence: 99%

“…For pseudomorphic Mn/ W͑110͒ films in-plane c͑2 ϫ 2͒ antiferromagnetism has been reported for monolayer films. 26 The epitaxial relationship is maintained up to a coverage of about three monolayers, 25 but in contrast to Fe/ W͑110͒ films, already the first Mn layer exhibits a modest growth anisotropy in the ͓001͔ direction. This anisotropy becomes even much more pronounced in the second Mn layer, and for films with three and more monolayers, island growth is observed.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of ultrathin magnetic Mn films on W surfaces.

Dennler

Häfner

2005

Phys. Rev. B

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The structural and magnetic properties of static compact thin Mn films deposed on W͑100͒ and W͑110͒ substrates have been investigated in the framework of the density functional theory. In good agreement with experiments, pseudomorphically adsorbed Mn films up to three monolayers ͑ML͒ are found to be stable despite the huge tensile strain induced by the epitaxial conditions. For Mn/ W͑110͒ our results demonstrate a c͑2 ϫ 2͒ in-plane antiferromagnetic order for thicknesses up to 3 ML, with a degenerated layered antiferromagnetism in the ͑110͒ planes for 3 ML thick Mn/ W͑110͒ films. For Mn/ W͑110͒ our calculations predict a ferromagnetic arrangement in 1 and 2 ML thick films stabilized by the hybridization with the substrate, with a transition to an antiferromagnetism layered in ͑100͒ planes at higher thickness. The effects induced by the reduced dimensionality are discussed based on the comparison with bulk Mn and free-standing Mn ML. The magnetic contribution to the adsorption is determined by comparing magnetic and nonmagnetic calculations.

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Growth of thin Mn films on W(110) studied by means of in-situ scanning tunnelling microscopy

Cited by 24 publications

References 22 publications

Preparation and photoemission investigation of bulklikeα-Mnfilms on W(110)

Preparation and photoemission investigation of bulklikeα-Mnfilms on W(110)

Structural, electronic, and magnetic properties of a Mn monolayer on W(110)

First-principles study of ultrathin magnetic Mn films on W surfaces.

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