Magnetic and magneto-optical studies in Co-Tb/Pt multilayers
Identifieur interne : 000318 ( PascalFrancis/Checkpoint ); précédent : 000317; suivant : 000319Magnetic and magneto-optical studies in Co-Tb/Pt multilayers
Auteurs : H. Hamouda [Maroc] ; H. Lassri [Maroc] ; R. Krishnan [France] ; D. Saifaoui [Maroc]Source :
- Solid state communications [ 0038-1098 ] ; 1998.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Platine.
English descriptors
- KwdEn :
Abstract
We have prepared Co86Tb14/Pt multilayers by r.f. sputtering and studied their magnetic and magneto-optical properties. As the Co-Tb layer thickness (tCoTb) decreases below 200A the saturation magnetization increases, the rectangularity of the M-H loops and the coercivity decrease. The effective anisotropy Keff of the multilayers was determined by a torque magnetometer. The product Keff X tCoTb shows a linear dependence with tCoTb as normally found for the superlattices yielding the bulk and surface anisotropies of 1 x 10 erg cm-3 and - 0.2 erg cm-2, respectively. These results are explained in terms of an interfacial Co-Pt layer. The polar Kerr rotation for the multilayers is found independent of layer thickness and is equal to 11.5 min, which is higher than the single thick layer.
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<s2>Casablanca</s2>
<s3>MAR</s3>
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<s2>Casablanca</s2>
<s3>MAR</s3>
<sZ>2 aut.</sZ>
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<s3>FRA</s3>
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<author><name sortKey="Saifaoui, D" sort="Saifaoui, D" uniqKey="Saifaoui D" first="D." last="Saifaoui">D. Saifaoui</name>
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<s3>MAR</s3>
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<series><title level="j" type="main">Solid state communications</title>
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<term>Cobalt alloys</term>
<term>Coercive force</term>
<term>Experimental study</term>
<term>Kerr magneto-optical effect</term>
<term>Magnetic anisotropy</term>
<term>Magnetic hysteresis</term>
<term>Multilayers</term>
<term>Platinum</term>
<term>Saturation magnetization</term>
<term>Superlattices</term>
<term>Terbium alloys</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Etude expérimentale</term>
<term>Multicouche</term>
<term>Effet Kerr magnétooptique</term>
<term>Aimantation saturation</term>
<term>Force coercitive</term>
<term>Superréseau</term>
<term>Anisotropie magnétique</term>
<term>Hystérésis magnétique</term>
<term>Cobalt alliage</term>
<term>Terbium alliage</term>
<term>Platine</term>
<term>Alliage binaire</term>
<term>7570C</term>
<term>Alliage CoTb</term>
<term>Pt</term>
<term>Co Tb</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Platine</term>
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<front><div type="abstract" xml:lang="en">We have prepared Co<sub>86</sub>
Tb<sub>14</sub>
/Pt multilayers by r.f. sputtering and studied their magnetic and magneto-optical properties. As the Co-Tb layer thickness (t<sub>CoTb</sub>
) decreases below 200A the saturation magnetization increases, the rectangularity of the M-H loops and the coercivity decrease. The effective anisotropy K<sub>eff</sub>
of the multilayers was determined by a torque magnetometer. The product K<sub>eff</sub>
X t<sub>CoTb</sub>
shows a linear dependence with t<sub>CoTb</sub>
as normally found for the superlattices yielding the bulk and surface anisotropies of 1 x 10 erg cm<sup>-3</sup>
and - 0.2 erg cm<sup>-2</sup>
, respectively. These results are explained in terms of an interfacial Co-Pt layer. The polar Kerr rotation for the multilayers is found independent of layer thickness and is equal to 11.5 min, which is higher than the single thick layer.</div>
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<s3>MAR</s3>
<sZ>1 aut.</sZ>
<sZ>4 aut.</sZ>
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<fA14 i1="02"><s1>Laboratoire de Physique des Matériaux et de Microélectronique, Université Hassan II, Faculté des Sciences, B.P.5366 Maârif, Ain Chock, Route d'El Jadida km-8</s1>
<s2>Casablanca</s2>
<s3>MAR</s3>
<sZ>2 aut.</sZ>
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<fA14 i1="03"><s1>Laboratoire de Magnétisme et d'Optique de l'Université de Versailles, CNRS, URA 1531, 45, Avenue des Etats-Unis</s1>
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<fC01 i1="01" l="ENG"><s0>We have prepared Co<sub>86</sub>
Tb<sub>14</sub>
/Pt multilayers by r.f. sputtering and studied their magnetic and magneto-optical properties. As the Co-Tb layer thickness (t<sub>CoTb</sub>
) decreases below 200A the saturation magnetization increases, the rectangularity of the M-H loops and the coercivity decrease. The effective anisotropy K<sub>eff</sub>
of the multilayers was determined by a torque magnetometer. The product K<sub>eff</sub>
X t<sub>CoTb</sub>
shows a linear dependence with t<sub>CoTb</sub>
as normally found for the superlattices yielding the bulk and surface anisotropies of 1 x 10 erg cm<sup>-3</sup>
and - 0.2 erg cm<sup>-2</sup>
, respectively. These results are explained in terms of an interfacial Co-Pt layer. The polar Kerr rotation for the multilayers is found independent of layer thickness and is equal to 11.5 min, which is higher than the single thick layer.</s0>
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<s5>02</s5>
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<s5>02</s5>
</fC03>
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<s5>03</s5>
</fC03>
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<s5>03</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Aimantation saturation</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Saturation magnetization</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Imanación saturación</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Force coercitive</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Coercive force</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Superréseau</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Superlattices</s0>
<s5>06</s5>
</fC03>
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<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Magnetic anisotropy</s0>
<s5>07</s5>
</fC03>
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<s5>08</s5>
</fC03>
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<s5>08</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Cobalt alliage</s0>
<s5>12</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Cobalt alloys</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Terbium alliage</s0>
<s5>13</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Terbium alloys</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Platine</s0>
<s2>NC</s2>
<s5>14</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Platinum</s0>
<s2>NC</s2>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE"><s0>Alliage binaire</s0>
<s5>15</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG"><s0>Binary alloys</s0>
<s5>15</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>7570C</s0>
<s2>PAC</s2>
<s4>INC</s4>
<s5>56</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Alliage CoTb</s0>
<s2>NK</s2>
<s4>INC</s4>
<s5>92</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Pt</s0>
<s4>INC</s4>
<s5>93</s5>
</fC03>
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<s4>INC</s4>
<s5>94</s5>
</fC03>
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<s5>16</s5>
</fC07>
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<s5>16</s5>
</fC07>
<fC07 i1="02" i2="3" l="FRE"><s0>Métal transition</s0>
<s5>17</s5>
</fC07>
<fC07 i1="02" i2="3" l="ENG"><s0>Transition elements</s0>
<s5>17</s5>
</fC07>
<fN21><s1>334</s1>
</fN21>
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<li>Maroc</li>
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<tree><country name="Maroc"><noRegion><name sortKey="Hamouda, H" sort="Hamouda, H" uniqKey="Hamouda H" first="H." last="Hamouda">H. Hamouda</name>
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