Magnetism of Ni polylayers on different metallic substrates

Kramer, I. R.; Bergmann, Gerd

doi:10.1103/physrevb.27.7271

Cited by 19 publications

(7 citation statements)

References 26 publications

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“…Ni being held as a good example of an itinerant ferromagnet, its behaviour on different substrates has been widely studied. In agreement with band calculations at 0 K [5,6] such different experiments as polarized photoemitted electron spectroscopy [7], electron capture spectroscopy [8], anomalous Hall effect [9] and electron spin polarized tunnelling measurements [10] find a reduced but non-zero magnetization of the first layer of Ni deposited on noble metals such as Cu or Au. But these experiments have all been made in high applied fields (H > 1 kOe) and at one fixed temperature.…”

Section: Le Journal De Physique -Lettressupporting

confidence: 68%

Anomalous behaviour of the Curie temperature of Au-Ni-Au sandwiches at ultra-low Ni thickness

Chappert¹,

Renard

Beauvillain³

et al. 1985

J. Phyique Lett.

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We have studied, between 2 K and 300 K and in fields up to 10 Oe, the magnetic behaviour of Au-Ni-Au sandwiches of Au thickness 200 A and Ni thickness ranging from 4 A to 18.6 A. The crystalline structure of our samples has also been carefully investigated. From the observed magnetic behaviour we can estimate the ferromagnetic transition temperature Tc : it shows an abrupt decrease around a Ni thickness of 12 Å, which could be related to a characteristic length of itinerant electron magnetism in Ni

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Section: Le Journal De Physique -Lettressupporting

confidence: 68%

Anomalous behaviour of the Curie temperature of Au-Ni-Au sandwiches at ultra-low Ni thickness

Chappert¹,

Renard

Beauvillain³

et al. 1985

J. Phyique Lett.

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“…For coverages above half a monolayer a measurement of the anomalous Hall effect confirms our earlier result that the Ni becomes ferromagnetic. 10 On the other hand, for the 3d atoms V, Cr, and Mn the anomalous Hall effect does not show ferromagnetic order. Furthermore, we observe that for Cr and V, neighboring atoms hinder each other in the formation of a magnetic moment.…”

Section: Methodsmentioning

confidence: 98%

Success and failure of the Friedel-Anderson resonance model for magnetic impurities: 3dimpurities on the surface of Au

Beckmann

Bergmann

1996

Phys. Rev. B

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The magnetic character of 3d atoms on the surface of Au is investigated using the method of quantum interference ͑weak localization͒. We find that single atoms of V, Cr, Mn, Fe, and Co are magnetic on the surface of Au while single atoms of Sc and Ni are nonmagnetic. Single atoms of Ti are locally spin fluctuating. The magnetic dephasing due to the 3d impurities has two maxima, one for iron and a smaller one for chromium impurities and a minimum for manganese. This behavior can be qualitatively described within the Friedel-Anderson model although the experimental values are smaller by roughly a factor of 5 than our theoretical estimates within this model. ͓S0163-1829͑96͒01825-5͔

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“…Experimentally, the existence of a ferromagnetic monolayer is particularly interesting. Already in the late 1970's, it was shown that monolayers of Fe, Co, and Ni are ferromagnetic on the surface of the noble metals, 7,8 while Ni monolayers loose their moment on the surface of polyvalent metals. 9 The recent predictions of ferromagnetism in adlayers of the conventionally nonmagnetic transition metals started an intensive search.…”

Section: Introductionmentioning

confidence: 99%

Magnetism of Rh and Ru atoms, clusters, and monolayers on Au and Ag surfaces

Beckmann

Bergmann

1997

Phys. Rev. B

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The magnetic character of Rh and Ru on the surface of Au and Ag is investigated by means of weak localization ͑WL͒ and the anomalous Hall effect ͑AHE͒. Dephasing of the conduction electrons in WL is the most sensitive method to detect magnetic surface impurities. The Au/Rh and Au/Ru systems are investigated in the range between 1/100 of a monolayer of Rh ͑Ru͒ and several monolayers of Rh ͑Ru͒. We observe a small dephasing by Rh clusters and no dephasing by single Rh surface impurities, while single Ru surface impurities cause already a finite but small dephasing. We suggest that the dephasing is caused by small fluctuating magnetic moments of the order of 0.1 (0.4) B. For a coverage of one monolayer of Rh we observe a maximum in the dephasing. However, we do not observe a ferromagnetic Rh monolayer as predicted in a number of theoretical papers. Similarly, a Ru monolayer on the surface of Au or Ag does not show ferromagnetism. The absence of an AHE in the Rh and Ru monolayers excludes ferromagnetism as well. For Rh the dephasing increases again when the Rh coverage exceeds two monolayers, suggesting that pure bulk Rh shows spin fluctuations. ͓S0163-1829͑97͒02622-2͔

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Magnetism of Ni polylayers on different metallic substrates

Cited by 19 publications

References 26 publications

Anomalous behaviour of the Curie temperature of Au-Ni-Au sandwiches at ultra-low Ni thickness

Anomalous behaviour of the Curie temperature of Au-Ni-Au sandwiches at ultra-low Ni thickness

Success and failure of the Friedel-Anderson resonance model for magnetic impurities: 3dimpurities on the surface of Au

Magnetism of Rh and Ru atoms, clusters, and monolayers on Au and Ag surfaces

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