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X-ray and spectral characterization of defects in garnets

Identifieur interne : 001377 ( Pascal/Curation ); précédent : 001376; suivant : 001378

X-ray and spectral characterization of defects in garnets

Auteurs : A. Lupei [Roumanie] ; C. Stoicescu [Roumanie] ; V. Lupei [Roumanie]

Source :

RBID : Pascal:97-0363417

Descripteurs français

English descriptors

Abstract

New information on the defects in high temperature (HT) grown YAG (Y3Al5O12) and GGG(Gd3Ga5O12) obtained from X-ray and optical spectroscopy of various rare earth dopants are presented. Low intensity {2 2 2} X-ray reflections, forbidden in the cubic garnet Ia3d space group, with equivalent intensities for the four [1 1 1] directions are observed in both crystals. Structural arguments in connection with optical spectroscopy data on various ions (Nd3+, Tm3+, Pr3+) allow us to assign these reflections (absent in flux grown crystals) to local reduction of symmetry introduced by nonstoichiometric random occupancy of octahedral sites by Y3+ or Gd3+ ions in HT garnets.
pA  
A01 01  1    @0 0022-0248
A02 01      @0 JCRGAE
A03   1    @0 J. cryst. growth
A05       @2 177
A06       @2 3-4
A08 01  1  ENG  @1 X-ray and spectral characterization of defects in garnets
A11 01  1    @1 LUPEI (A.)
A11 02  1    @1 STOICESCU (C.)
A11 03  1    @1 LUPEI (V.)
A14 01      @1 Institute of Atomic Physics @2 Bucharest 76900 @3 ROM @Z 1 aut. @Z 2 aut. @Z 3 aut.
A20       @1 207-210
A21       @1 1997
A23 01      @0 ENG
A43 01      @1 INIST @2 13507 @5 354000067387520060
A44       @0 0000 @1 © 1997 INIST-CNRS. All rights reserved.
A45       @0 11 ref.
A47 01  1    @0 97-0363417
A60       @1 P
A61       @0 A
A64 01  1    @0 Journal of crystal growth
A66 01      @0 NLD
C01 01    ENG  @0 New information on the defects in high temperature (HT) grown YAG (Y3Al5O12) and GGG(Gd3Ga5O12) obtained from X-ray and optical spectroscopy of various rare earth dopants are presented. Low intensity {2 2 2} X-ray reflections, forbidden in the cubic garnet Ia3d space group, with equivalent intensities for the four [1 1 1] directions are observed in both crystals. Structural arguments in connection with optical spectroscopy data on various ions (Nd3+, Tm3+, Pr3+) allow us to assign these reflections (absent in flux grown crystals) to local reduction of symmetry introduced by nonstoichiometric random occupancy of octahedral sites by Y3+ or Gd3+ ions in HT garnets.
C02 01  3    @0 001B60A72F
C03 01  3  FRE  @0 Etude expérimentale @5 01
C03 01  3  ENG  @0 Experimental study @5 01
C03 02  3  FRE  @0 Défaut cristallin @5 02
C03 02  3  ENG  @0 Crystal defects @5 02
C03 03  3  FRE  @0 Grenats @5 03
C03 03  3  ENG  @0 Garnets @5 03
C03 04  3  FRE  @0 Impureté @5 04
C03 04  3  ENG  @0 Impurities @5 04
C03 05  3  FRE  @0 Spectrométrie RX @5 05
C03 05  3  ENG  @0 X-ray spectroscopy @5 05
C03 06  X  FRE  @0 Spectrométrie optique @5 06
C03 06  X  ENG  @0 Optical spectrometry @5 06
C03 06  X  SPA  @0 Espectrometría óptica @5 06
C03 07  3  FRE  @0 Addition néodyme @5 07
C03 07  3  ENG  @0 Neodymium additions @5 07
C03 08  3  FRE  @0 Addition thulium @5 08
C03 08  3  ENG  @0 Thulium additions @5 08
C03 09  3  FRE  @0 Addition praséodyme @5 09
C03 09  3  ENG  @0 Praseodymium additions @5 09
C03 10  3  FRE  @0 Composé ternaire @5 11
C03 10  3  ENG  @0 Ternary compounds @5 11
C03 11  3  FRE  @0 Yttrium oxyde @2 NK @5 13
C03 11  3  ENG  @0 Yttrium oxides @2 NK @5 13
C03 12  3  FRE  @0 Aluminium oxyde @2 NK @5 14
C03 12  3  ENG  @0 Aluminium oxides @2 NK @5 14
C03 13  3  FRE  @0 Gadolinium oxyde @2 NK @5 16
C03 13  3  ENG  @0 Gadolinium oxides @2 NK @5 16
C03 14  3  FRE  @0 Gallium oxyde @2 NK @5 17
C03 14  3  ENG  @0 Gallium oxides @2 NK @5 17
C03 15  3  FRE  @0 Matériau laser @5 18
C03 15  3  ENG  @0 Laser materials @5 18
C03 16  3  FRE  @0 6172F @2 PAC @4 INC @5 56
C03 17  3  FRE  @0 Y3Al5O12 @4 INC @5 92
C03 18  3  FRE  @0 Al O Y @4 INC @5 93
C03 19  3  FRE  @0 Gd3Ga5O12 @4 INC @5 94
C03 20  3  FRE  @0 Ga Gd O @4 INC @5 95
C07 01  3  FRE  @0 Composé minéral @5 10
C07 01  3  ENG  @0 Inorganic compounds @5 10
C07 02  3  FRE  @0 Métal transition composé @5 12
C07 02  3  ENG  @0 Transition element compounds @5 12
C07 03  3  FRE  @0 Lanthanide composé @5 15
C07 03  3  ENG  @0 Rare earth compounds @5 15
N21       @1 216

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Pascal:97-0363417

Le document en format XML

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<title xml:lang="en" level="a">X-ray and spectral characterization of defects in garnets</title>
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<s1>Institute of Atomic Physics</s1>
<s2>Bucharest 76900</s2>
<s3>ROM</s3>
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<sZ>3 aut.</sZ>
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<country wicri:auto="ROM">Roumanie</country>
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</author>
<author>
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<idno type="RBID">Pascal:97-0363417</idno>
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<title xml:lang="en" level="a">X-ray and spectral characterization of defects in garnets</title>
<author>
<name sortKey="Lupei, A" sort="Lupei, A" uniqKey="Lupei A" first="A." last="Lupei">A. Lupei</name>
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<author>
<name sortKey="Stoicescu, C" sort="Stoicescu, C" uniqKey="Stoicescu C" first="C." last="Stoicescu">C. Stoicescu</name>
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<s1>Institute of Atomic Physics</s1>
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<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
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<country wicri:auto="ROM">Roumanie</country>
</affiliation>
</author>
<author>
<name sortKey="Lupei, V" sort="Lupei, V" uniqKey="Lupei V" first="V." last="Lupei">V. Lupei</name>
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<s1>Institute of Atomic Physics</s1>
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<country wicri:auto="ROM">Roumanie</country>
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<title level="j" type="main">Journal of crystal growth</title>
<title level="j" type="abbreviated">J. cryst. growth</title>
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<imprint>
<date when="1997">1997</date>
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<title level="j" type="main">Journal of crystal growth</title>
<title level="j" type="abbreviated">J. cryst. growth</title>
<idno type="ISSN">0022-0248</idno>
</seriesStmt>
</fileDesc>
<profileDesc>
<textClass>
<keywords scheme="KwdEn" xml:lang="en">
<term>Aluminium oxides</term>
<term>Crystal defects</term>
<term>Experimental study</term>
<term>Gadolinium oxides</term>
<term>Gallium oxides</term>
<term>Garnets</term>
<term>Impurities</term>
<term>Laser materials</term>
<term>Neodymium additions</term>
<term>Optical spectrometry</term>
<term>Praseodymium additions</term>
<term>Ternary compounds</term>
<term>Thulium additions</term>
<term>X-ray spectroscopy</term>
<term>Yttrium oxides</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr">
<term>Etude expérimentale</term>
<term>Défaut cristallin</term>
<term>Grenats</term>
<term>Impureté</term>
<term>Spectrométrie RX</term>
<term>Spectrométrie optique</term>
<term>Addition néodyme</term>
<term>Addition thulium</term>
<term>Addition praséodyme</term>
<term>Composé ternaire</term>
<term>Yttrium oxyde</term>
<term>Aluminium oxyde</term>
<term>Gadolinium oxyde</term>
<term>Gallium oxyde</term>
<term>Matériau laser</term>
<term>6172F</term>
<term>Y3Al5O12</term>
<term>Al O Y</term>
<term>Gd3Ga5O12</term>
<term>Ga Gd O</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract" xml:lang="en">New information on the defects in high temperature (HT) grown YAG (Y
<sub>3</sub>
Al
<sub>5</sub>
O
<sub>12</sub>
) and GGG(Gd
<sub>3</sub>
Ga
<sub>5</sub>
O
<sub>12</sub>
) obtained from X-ray and optical spectroscopy of various rare earth dopants are presented. Low intensity {2 2 2} X-ray reflections, forbidden in the cubic garnet Ia3d space group, with equivalent intensities for the four [1 1 1] directions are observed in both crystals. Structural arguments in connection with optical spectroscopy data on various ions (Nd
<sup>3+</sup>
, Tm
<sup>3+</sup>
, Pr
<sup>3+</sup>
) allow us to assign these reflections (absent in flux grown crystals) to local reduction of symmetry introduced by nonstoichiometric random occupancy of octahedral sites by Y
<sup>3+</sup>
or Gd
<sup>3+</sup>
ions in HT garnets.</div>
</front>
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<s0>J. cryst. growth</s0>
</fA03>
<fA05>
<s2>177</s2>
</fA05>
<fA06>
<s2>3-4</s2>
</fA06>
<fA08 i1="01" i2="1" l="ENG">
<s1>X-ray and spectral characterization of defects in garnets</s1>
</fA08>
<fA11 i1="01" i2="1">
<s1>LUPEI (A.)</s1>
</fA11>
<fA11 i1="02" i2="1">
<s1>STOICESCU (C.)</s1>
</fA11>
<fA11 i1="03" i2="1">
<s1>LUPEI (V.)</s1>
</fA11>
<fA14 i1="01">
<s1>Institute of Atomic Physics</s1>
<s2>Bucharest 76900</s2>
<s3>ROM</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
</fA14>
<fA20>
<s1>207-210</s1>
</fA20>
<fA21>
<s1>1997</s1>
</fA21>
<fA23 i1="01">
<s0>ENG</s0>
</fA23>
<fA43 i1="01">
<s1>INIST</s1>
<s2>13507</s2>
<s5>354000067387520060</s5>
</fA43>
<fA44>
<s0>0000</s0>
<s1>© 1997 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45>
<s0>11 ref.</s0>
</fA45>
<fA47 i1="01" i2="1">
<s0>97-0363417</s0>
</fA47>
<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>Journal of crystal growth</s0>
</fA64>
<fA66 i1="01">
<s0>NLD</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>New information on the defects in high temperature (HT) grown YAG (Y
<sub>3</sub>
Al
<sub>5</sub>
O
<sub>12</sub>
) and GGG(Gd
<sub>3</sub>
Ga
<sub>5</sub>
O
<sub>12</sub>
) obtained from X-ray and optical spectroscopy of various rare earth dopants are presented. Low intensity {2 2 2} X-ray reflections, forbidden in the cubic garnet Ia3d space group, with equivalent intensities for the four [1 1 1] directions are observed in both crystals. Structural arguments in connection with optical spectroscopy data on various ions (Nd
<sup>3+</sup>
, Tm
<sup>3+</sup>
, Pr
<sup>3+</sup>
) allow us to assign these reflections (absent in flux grown crystals) to local reduction of symmetry introduced by nonstoichiometric random occupancy of octahedral sites by Y
<sup>3+</sup>
or Gd
<sup>3+</sup>
ions in HT garnets.</s0>
</fC01>
<fC02 i1="01" i2="3">
<s0>001B60A72F</s0>
</fC02>
<fC03 i1="01" i2="3" l="FRE">
<s0>Etude expérimentale</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="3" l="ENG">
<s0>Experimental study</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="3" l="FRE">
<s0>Défaut cristallin</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="3" l="ENG">
<s0>Crystal defects</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="3" l="FRE">
<s0>Grenats</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG">
<s0>Garnets</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE">
<s0>Impureté</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG">
<s0>Impurities</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE">
<s0>Spectrométrie RX</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG">
<s0>X-ray spectroscopy</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Spectrométrie optique</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Optical spectrometry</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Espectrometría óptica</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE">
<s0>Addition néodyme</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG">
<s0>Neodymium additions</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE">
<s0>Addition thulium</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG">
<s0>Thulium additions</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE">
<s0>Addition praséodyme</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG">
<s0>Praseodymium additions</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE">
<s0>Composé ternaire</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG">
<s0>Ternary compounds</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE">
<s0>Yttrium oxyde</s0>
<s2>NK</s2>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG">
<s0>Yttrium oxides</s0>
<s2>NK</s2>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="3" l="FRE">
<s0>Aluminium oxyde</s0>
<s2>NK</s2>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="3" l="ENG">
<s0>Aluminium oxides</s0>
<s2>NK</s2>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE">
<s0>Gadolinium oxyde</s0>
<s2>NK</s2>
<s5>16</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG">
<s0>Gadolinium oxides</s0>
<s2>NK</s2>
<s5>16</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE">
<s0>Gallium oxyde</s0>
<s2>NK</s2>
<s5>17</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG">
<s0>Gallium oxides</s0>
<s2>NK</s2>
<s5>17</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE">
<s0>Matériau laser</s0>
<s5>18</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG">
<s0>Laser materials</s0>
<s5>18</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE">
<s0>6172F</s0>
<s2>PAC</s2>
<s4>INC</s4>
<s5>56</s5>
</fC03>
<fC03 i1="17" i2="3" l="FRE">
<s0>Y3Al5O12</s0>
<s4>INC</s4>
<s5>92</s5>
</fC03>
<fC03 i1="18" i2="3" l="FRE">
<s0>Al O Y</s0>
<s4>INC</s4>
<s5>93</s5>
</fC03>
<fC03 i1="19" i2="3" l="FRE">
<s0>Gd3Ga5O12</s0>
<s4>INC</s4>
<s5>94</s5>
</fC03>
<fC03 i1="20" i2="3" l="FRE">
<s0>Ga Gd O</s0>
<s4>INC</s4>
<s5>95</s5>
</fC03>
<fC07 i1="01" i2="3" l="FRE">
<s0>Composé minéral</s0>
<s5>10</s5>
</fC07>
<fC07 i1="01" i2="3" l="ENG">
<s0>Inorganic compounds</s0>
<s5>10</s5>
</fC07>
<fC07 i1="02" i2="3" l="FRE">
<s0>Métal transition composé</s0>
<s5>12</s5>
</fC07>
<fC07 i1="02" i2="3" l="ENG">
<s0>Transition element compounds</s0>
<s5>12</s5>
</fC07>
<fC07 i1="03" i2="3" l="FRE">
<s0>Lanthanide composé</s0>
<s5>15</s5>
</fC07>
<fC07 i1="03" i2="3" l="ENG">
<s0>Rare earth compounds</s0>
<s5>15</s5>
</fC07>
<fN21>
<s1>216</s1>
</fN21>
</pA>
</standard>
</inist>
</record>

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   |area=    ThuliumV1
   |flux=    Pascal
   |étape=   Curation
   |type=    RBID
   |clé=     Pascal:97-0363417
   |texte=   X-ray and spectral characterization of defects in garnets
}}

Wicri

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Data generation: Thu May 12 08:27:09 2016. Site generation: Thu Mar 7 22:33:44 2024