PtMnSb, a material with very high magneto-optical Kerr effect

Engen, P.G. van; Buschow, K.H.J.; Jongebreur, R.; Erman, M.

doi:10.1063/1.93849

Cited by 318 publications

(127 citation statements)

References 8 publications

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“…To prove these points, we present the first data on magnetic circular dichroism in SHG, which amounts to an asymmetry of (7 ± 2)% when measured in reflection off the PtMnSb(JII) surface. We also show that the SHG polarization turns by about 90° when changing from a demagnetized to a magnetized state of the Heussler alloy PtMnSb [ 17,18].Such big effects are characteristic for materials with strong electronic anisotropies, like some of the Heussler alloys. These are known for their asymmetric electronic structure with regard to the electron spin orientation [19,201.…”

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confidence: 85%

Influence of magnetism on second harmonic generation

1993

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Optical second harmonic generation (SHG) in 75° reflection was studied on longitudinally magnetized PtMnSb(III) and magnetic circular dichroism was observed with SHG. For circularly polarized incident light of 532 nm it amounts to (7 ± I)%. For linearly polarized incident radiation this leads to a nonlinear magneto-optical Kerr rotation of (14±2) 0 • The strong symmetry-breaking effect of the magnetization is demonstrated by a 90° turn of the SH polarization ellipse with regard to the linear polarization of the fundamental light. PACS numbers: 78.20.Ls, 42.65.Ky Stimulated by theoretical and experimental progress as well as technological demands, magnetism of surfaces, alloys, thin films, and multilayer systems has recently received increased attention. Of primary interest are anisotropic effects which result from the distortion of the electronic charge distribution induced by the spin-orbit interaction. Examples are the existence of an electric field gradient in cubic crystals [!], anisotropic electric conductivity [2], magnetic dichroism in x-ray adsorption [3][4][5][6] and photoemission [7,8], and the Faraday and the magneto-optical Kerr effect (MOKE) [9, I 01. In this context it has been pointed out [11,12] and experimentally demonstrated [13,14] that optical second harmonic generation (SHG) is a technique particularly well suited for monitoring the symmetry reduction caused by magnetization. Although this technique is experimentally easy to handle under both normal and UHV conditions, it has up to now not received the attention that rhymes with its potential. The theory for the nonlinear magneto-optical Kerr effect (NOLIMOKE) has been worked out by H iibner and Bennemann [ 12], who predicted the spectral dependence of the nonlinear susceptibility for nickel. Aktsipetrov, Braginskii, and Esikov [13] studied SHG both in transmission and reflection on magnetized epitaxial Y2.sBio.sFe5012 films on an Y3Fes012 substrate. They reported a magneto-optical Kerr rotation between I o and 4°, dependent on film thickness but nevertheless significantly larger compared to the linear Kerr rotation. Reif eta/. [14] showed that SHG is a sensitive technique for detecting surface magnetism of ferromagnetic crystals in UHV. We are not aware of any reports on magnetic circular dichroism in SHG, although in analogy to magnetic circular x-ray dichroism [3-61, this quantity is expected to yield information about the occupation of spinup and spin-down states in the conduction band [ 12-151. It is the purpose of this Letter to demonstrate the influence of magnetization on SHG. The observed large effects on SHG in reflection are caused by two effects. First, with magnetic orderiny the symmetry of the nonlinear susceptibility tensor x 2 > is changed, compared to the nonmagnetic situation [II,13,161. Second, the strength of the spin-orbit interaction determines the size of the tensor components [ 12]. It also introduces the sensitivity to the magnetization direction with regard to the k vector of the incident light. To prove these ...

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confidence: 85%

Influence of magnetism on second harmonic generation

1993

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“…Heusler alloy PtMnSb with a Cl b structure exhibits a very large magneto-optical Kerr effect, but it seems to be difficult to obtain perpendicular magnetic anisotropy of its thin film, which is one of the indispensable properties for a magneto-optical storage application, on account of a small magneto-crystalline anisotropy of the Cl b structure [1,2]. This may be a main reason to cause the PtMnSb fIlm to remain less attractive for a magneto-optical memory application.…”

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confidence: 97%

MAGNETIC PROPERTIES AND TEXTURE CONTROL OF THE PtMnSb-MnSb AND -Mn2Sb TWO-PHASE FILMS BY SOLID-STATE REACTION OF THE MULTILAYERS

et al. 1993

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Abstract-The solid-state phase formation process by thermal annealing of the multilayered films consisting of two kinds of unit lamellae, PtJMnlSb and MnlSb, was investigated by means of x-ray diffraction and transmission electron microscopy. The magnetization loops of the films were measured at room temperature by using a vibrating sample magnetometer. The films consisting of the two phases of PtMnSb and MnSb or Mn 2 Sb were successively produced The relative amount of the PtMnSb and MnSb or Mn2Sb phases was considerably affected by the initial stacking pattern as well as the substrate temperature. In addition, these conditions brought a substantial change in the preferred orientation of the MnSb and Mn2Sb phases through the nucleation process. The magnetic anisotropy of the films changed significantly in accordance with the film structure such as the preferred orientation and relative phase amounts.

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“…Для основного состояния никельсодержащего сплава получены (дан-ные в скобках заимствованы из работы [20]) следующие значения магнитных моментов на фрагментах его кристаллической решётки: [23] для магнитного момен-та ячейки сплава с никелем также получено расчётное значение m Cell = 4,000µ В . Упомянутые величины оказываются не только близ-кими друг к другу, но и хорошо подтверждаются эксперименталь-ными данными: m Mn = 3,85µ В [20], m Cell = 4,0µ В [8,9].…”

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Distribution of Atoms on Crystallographic Positions in Heusler Alloys $M$MnSb ($M$ = Co, Ni, Cu) and Their Electronic Structure

Uvarov¹,

Uvarov²

2017

Metallofiz. Noveishie Tekhnol.

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PtMnSb, a material with very high magneto-optical Kerr effect

Cited by 318 publications

References 8 publications

Influence of magnetism on second harmonic generation

Influence of magnetism on second harmonic generation

MAGNETIC PROPERTIES AND TEXTURE CONTROL OF THE PtMnSb-MnSb AND -Mn2Sb TWO-PHASE FILMS BY SOLID-STATE REACTION OF THE MULTILAYERS

Distribution of Atoms on Crystallographic Positions in Heusler Alloys $M$MnSb ($M$ = Co, Ni, Cu) and Their Electronic Structure

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