magnetic multilayers;
cobalt;
small-angle X-ray scattering technique under grazing incidence (GISAXS);
D O I:
10.1016/S0040-6090(97)01090-0
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
There has been a lot of interest in small magnetic particles for a number of years. Recently, tunnel magnetoresistance (TMR) effects have been shown in Co/Al2O3 granular multilayers, where the cobalt aggregates are embedded in an insulating nonmagnetic matrix. These effects depend strongly on the size and spacing of the aggregates. In order to characterize the morphology of the aggregates and their organization in the multilayer, we used the small-angle X-ray scattering technique under grazing incidence (GISAXS). The experiments are then carried out at/or near the critical angle. The result is a considerably enhanced surface sensitivity. It is then possible to determine the sizes of the aggregates which are found to be in very good agreement with transmission electron microscopy (TEM) results. Furthermore, the correlations in the plane of the layers and the cross-correlations from layer to layer can be determined. (C) 1998 Elsevier Science S.A.
机构:
Bhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India
Biswas, A.
Haque, S. Maidul
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VIZAG Ctr, Atom & Mol Phys Div, Bhabha Atom Res Ctr, Visakhapatnam 530012, Andhra Pradesh, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India
Haque, S. Maidul
Tripathi, S.
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VIZAG Ctr, Atom & Mol Phys Div, Bhabha Atom Res Ctr, Visakhapatnam 530012, Andhra Pradesh, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India
Tripathi, S.
De, Rajnarayan
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VIZAG Ctr, Atom & Mol Phys Div, Bhabha Atom Res Ctr, Visakhapatnam 530012, Andhra Pradesh, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India
De, Rajnarayan
Rai, S.
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Raja Raman Ctr Adv Technol, Ind Synchrotron Utilizat Div, Indore 452013, Madhya Pradesh, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India
Rai, S.
Bhattacharyya, D.
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Bhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India
Bhattacharyya, D.
Sahoo, N. K.
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Bhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Atom & Mol Phys Div, Bombay 400085, Maharashtra, India