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Magnetic study of HfFe6Ge6-type solid solutions TbMn6Ge6-xGax (0.05≤x≤0.60) and TmMn6Ge6-xGax (0.2≤x≤1.0)

Identifieur interne : 002537 ( Main/Merge ); précédent : 002536; suivant : 002538

Magnetic study of HfFe6Ge6-type solid solutions TbMn6Ge6-xGax (0.05≤x≤0.60) and TmMn6Ge6-xGax (0.2≤x≤1.0)

Auteurs : Gérard Venturini (physicien) [France]

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2000.

RBID : Pascal:01-0056184

Descripteurs français

Pascal (Inist)
- Aimantation, Ordre magnétique, Ferrimagnétisme, Antiferromagnétisme, Dépendance température, Réorientation spin, Hystérésis magnétique, Interaction échange, Effet composition, Solution solide, Terbium alliage, Manganèse alliage, Germanium alliage, Gallium alliage, Thulium alliage, Alliage quaternaire, Etude expérimentale, Alliage GaGeMnTb, Ga Ge Mn Tb, Alliage GaGeMnTm, Ga Ge Mn Tm, 7525, 7560E.

English descriptors

KwdEn :
- Antiferromagnetism, Composition effect, Exchange interactions, Experimental study, Ferrimagnetism, Gallium alloys, Germanium alloys, Magnetic hysteresis, Magnetic ordering, Magnetization, Manganese alloys, Quaternary alloys, Solid solutions, Spin reorientation, Temperature dependence, Terbium alloys, Thulium alloys.

Abstract

The TbMn₆Ge_6-xGa_x (0.05≤x≤0.60) and TmMn₆Ge_6-xGa_x (0.2≤x≤1.0) compounds have been studied by magnetization measurements in the temperature range 10-600 K. The TbMn₆Ge_6-xGa_x compounds order ferrimagnetically above room temperature (452≥T_c≥438 K). The low Ga content compounds (x≤0.2) display a ferri- to antiferromagnetic transition on cooling (363≥T₁≥181 K) and a second Curie point at lower temperature (49≤T_y≤108 K). The high Ga content compounds display ferrimagnetic ordering in their whole ordered range and a spin reorientation transition at low temperature (112≤T_SF≤162 K). The TmMn₆Ge_6-xGa_x compounds (x≤0.8) order antiferromagnetically above the room temperature (476≥TN≥372 K) and except TmMn₆Ge_5-8Ga_0.2, display a ferrimagnetic ordering at lower temperature (32≤T_c≤250 K). TmMn₆GF₅Ga is ferrimagnetic in its whole ordered range. The Ga-rich compounds (x≥0.6) display a spin reorientation process around 50 K. All the ferrimagnetic compounds display large anisotropy effects at low temperature. The coercive fields measured for TbMn₆Ge_5.4Ga_0.6 and TmMn₆Ge₅Ga₁ are greater than 25 and 20 kOe, respectively. The evolutions of the magnetic properties and magnetocrystalline anisotropy are discussed.

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Le document en format XML

<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Magnetic study of HfFe<sub>6</sub>
Ge<sub>6</sub>
-type solid solutions TbMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 (0.05≤x≤0.60) and TmMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 (0.2≤x≤1.0)</title>
<author><name sortKey="Venturini, G" sort="Venturini, G" uniqKey="Venturini G" first="G." last="Venturini">Gérard Venturini (physicien)</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Chimie du Solide Minéral, Université Henri Poincaré-Nancy I, associé au CNRS (UMR 7555), B.P. 239</s1>
<s2>54506 Vandoeuvre les Nancy</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
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<country>France</country>
<placeName><region type="region" nuts="2">Grand Est</region>
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<placeName><settlement type="city">Nancy</settlement>
<region type="region" nuts="2">Grand Est</region>
<region type="region" nuts="2">Lorraine (région)</region>
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<orgName type="laboratoire" n="5">Institut Jean Lamour</orgName>
<orgName type="university">Université de Lorraine</orgName>
<orgName type="institution">Centre national de la recherche scientifique</orgName>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Magnetic study of HfFe<sub>6</sub>
Ge<sub>6</sub>
-type solid solutions TbMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 (0.05≤x≤0.60) and TmMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 (0.2≤x≤1.0)</title>
<author><name sortKey="Venturini, G" sort="Venturini, G" uniqKey="Venturini G" first="G." last="Venturini">Gérard Venturini (physicien)</name>
<affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Chimie du Solide Minéral, Université Henri Poincaré-Nancy I, associé au CNRS (UMR 7555), B.P. 239</s1>
<s2>54506 Vandoeuvre les Nancy</s2>
<s3>FRA</s3>
<sZ>1 aut.</sZ>
</inist:fA14>
<country>France</country>
<placeName><region type="region" nuts="2">Grand Est</region>
<region type="old region" nuts="2">Lorraine (région)</region>
<settlement type="city">Vandoeuvre les Nancy</settlement>
</placeName>
<placeName><settlement type="city">Nancy</settlement>
<region type="region" nuts="2">Grand Est</region>
<region type="region" nuts="2">Lorraine (région)</region>
</placeName>
<orgName type="laboratoire" n="5">Institut Jean Lamour</orgName>
<orgName type="university">Université de Lorraine</orgName>
<orgName type="institution">Centre national de la recherche scientifique</orgName>
</affiliation>
</author>
</analytic>
<series><title level="j" type="main">Journal of alloys and compounds</title>
<title level="j" type="abbreviated">J. alloys compd.</title>
<idno type="ISSN">0925-8388</idno>
<imprint><date when="2000">2000</date>
</imprint>
</series>
</biblStruct>
</sourceDesc>
<seriesStmt><title level="j" type="main">Journal of alloys and compounds</title>
<title level="j" type="abbreviated">J. alloys compd.</title>
<idno type="ISSN">0925-8388</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Antiferromagnetism</term>
<term>Composition effect</term>
<term>Exchange interactions</term>
<term>Experimental study</term>
<term>Ferrimagnetism</term>
<term>Gallium alloys</term>
<term>Germanium alloys</term>
<term>Magnetic hysteresis</term>
<term>Magnetic ordering</term>
<term>Magnetization</term>
<term>Manganese alloys</term>
<term>Quaternary alloys</term>
<term>Solid solutions</term>
<term>Spin reorientation</term>
<term>Temperature dependence</term>
<term>Terbium alloys</term>
<term>Thulium alloys</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Aimantation</term>
<term>Ordre magnétique</term>
<term>Ferrimagnétisme</term>
<term>Antiferromagnétisme</term>
<term>Dépendance température</term>
<term>Réorientation spin</term>
<term>Hystérésis magnétique</term>
<term>Interaction échange</term>
<term>Effet composition</term>
<term>Solution solide</term>
<term>Terbium alliage</term>
<term>Manganèse alliage</term>
<term>Germanium alliage</term>
<term>Gallium alliage</term>
<term>Thulium alliage</term>
<term>Alliage quaternaire</term>
<term>Etude expérimentale</term>
<term>Alliage GaGeMnTb</term>
<term>Ga Ge Mn Tb</term>
<term>Alliage GaGeMnTm</term>
<term>Ga Ge Mn Tm</term>
<term>7525</term>
<term>7560E</term>
</keywords>
</textClass>
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<front><div type="abstract" xml:lang="en">The TbMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 (0.05≤x≤0.60) and TmMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 (0.2≤x≤1.0) compounds have been studied by magnetization measurements in the temperature range 10-600 K. The TbMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 compounds order ferrimagnetically above room temperature (452≥T<sub>c</sub>
≥438 K). The low Ga content compounds (x≤0.2) display a ferri- to antiferromagnetic transition on cooling (363≥T<sub>1</sub>
≥181 K) and a second Curie point at lower temperature (49≤T<sub>y</sub>
≤108 K). The high Ga content compounds display ferrimagnetic ordering in their whole ordered range and a spin reorientation transition at low temperature (112≤T<sub>SF</sub>
≤162 K). The TmMn<sub>6</sub>
Ge<sub>6-x</sub>
Ga<sub>x</sub>
 compounds (x≤0.8) order antiferromagnetically above the room temperature (476≥TN≥372 K) and except TmMn<sub>6</sub>
Ge<sub>5-8</sub>
Ga<sub>0.2</sub>
, display a ferrimagnetic ordering at lower temperature (32≤T<sub>c</sub>
≤250 K). TmMn<sub>6</sub>
GF<sub>5</sub>
Ga is ferrimagnetic in its whole ordered range. The Ga-rich compounds (x≥0.6) display a spin reorientation process around 50 K. All the ferrimagnetic compounds display large anisotropy effects at low temperature. The coercive fields measured for TbMn<sub>6</sub>
Ge<sub>5.</sub>
4Ga<sub>0.6</sub>
 and TmMn<sub>6</sub>
Ge<sub>5</sub>
Ga<sub>1</sub>
 are greater than 25 and 20 kOe, respectively. The evolutions of the magnetic properties and magnetocrystalline anisotropy are discussed.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
</country>
<region><li>Grand Est</li>
<li>Lorraine (région)</li>
</region>
<settlement><li>Nancy</li>
<li>Vandoeuvre les Nancy</li>
</settlement>
<orgName><li>Centre national de la recherche scientifique</li>
<li>Institut Jean Lamour</li>
<li>Université de Lorraine</li>
</orgName>
</list>
<tree><country name="France"><region name="Grand Est"><name sortKey="Venturini, G" sort="Venturini, G" uniqKey="Venturini G" first="G." last="Venturini">Gérard Venturini (physicien)</name>
</region>
</country>
</tree>
</affiliations>
</record>

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Magnetic study of HfFe6Ge6-type solid solutions TbMn6Ge6-xGax (0.05≤x≤0.60) and TmMn6Ge6-xGax (0.2≤x≤1.0)

Magnetic study of HfFe6Ge6-type solid solutions TbMn6Ge6-xGax (0.05≤x≤0.60) and TmMn6Ge6-xGax (0.2≤x≤1.0)

Source :

Descripteurs français

English descriptors

Abstract

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