A. M. Balagurov, I. A. Bobrikov, D. Yu. Chernyshov, A. S. Sohatsky, S. V. Sumnikov, B. Yerzhanov, I. S. Golovin
{"title":"铁-镓合金中的四方相:定量研究","authors":"A. M. Balagurov, I. A. Bobrikov, D. Yu. Chernyshov, A. S. Sohatsky, S. V. Sumnikov, B. Yerzhanov, I. S. Golovin","doi":"10.1103/physrevmaterials.8.073604","DOIUrl":null,"url":null,"abstract":"Currently, the dominant model for the formation of enhanced magnetostriction of Fe-Ga alloys is based on the assumption of the presence of microscopic inclusions with a tetragonal <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>L</mi><msub><mn>6</mn><mn>0</mn></msub></mrow></math> structure in the cubic matrix of the alloy. However, no evidence for the presence of this phase in the bulk of the alloys in amounts sufficient to have a noticeable effect on the magnitude of magnetostriction has been obtained so far. To test this hypothesis, a detailed scanning of the reciprocal space of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"normal\">F</mi><msub><mi mathvariant=\"normal\">e</mi><mn>81</mn></msub><mi mathvariant=\"normal\">G</mi><msub><mi mathvariant=\"normal\">a</mi><mn>19</mn></msub><mi mathvariant=\"normal\">T</mi><msub><mi mathvariant=\"normal\">b</mi><mrow><mn>0.1</mn></mrow></msub></mrow></math> and <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><msub><mi>Fe</mi><mn>73</mn></msub><msub><mi>Ga</mi><mn>27</mn></msub></mrow></math> single crystals was carried out at ESRF at high photon flux stations. In particular, it was possible to reliably record superstructure diffraction peaks, the intensity of which was at a level of <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mn>2</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>6</mn></mrow></msup></mrow></math> from the intensity of the fundamental peaks. Nevertheless, neither the presence of superstructure diffraction peaks obviously belonging to the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>L</mi><msub><mn>6</mn><mn>0</mn></msub></mrow></math> phase nor the tetragonal splitting of the fundamental diffraction peaks into components, which could indicate the presence of this phase in the samples, was detected. Similar results were obtained using complementary methods (electron and neutron diffraction). Based on the performed analysis of the background level in the places of the expected positions of superstructure peaks of the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi>L</mi><msub><mn>6</mn><mn>0</mn></msub></mrow></math> phase, it was found that the volume fraction of this phase in the <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mrow><mi mathvariant=\"normal\">F</mi><msub><mi mathvariant=\"normal\">e</mi><mn>81</mn></msub><mi mathvariant=\"normal\">G</mi><msub><mi mathvariant=\"normal\">a</mi><mn>19</mn></msub><mi mathvariant=\"normal\">T</mi><msub><mi mathvariant=\"normal\">b</mi><mrow><mn>0.1</mn></mrow></msub></mrow></math> alloy cannot exceed 0.2 %. The presence of a previously discovered <math xmlns=\"http://www.w3.org/1998/Math/MathML\"><mi>X</mi></math> phase with hexagonal or orthorhombic symmetry in a crystal with 27 at. % Ga was confirmed.","PeriodicalId":20545,"journal":{"name":"Physical Review Materials","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tetragonal phases in Fe-Ga alloys: A quantitative study\",\"authors\":\"A. M. Balagurov, I. A. Bobrikov, D. Yu. Chernyshov, A. S. Sohatsky, S. V. Sumnikov, B. Yerzhanov, I. S. Golovin\",\"doi\":\"10.1103/physrevmaterials.8.073604\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Currently, the dominant model for the formation of enhanced magnetostriction of Fe-Ga alloys is based on the assumption of the presence of microscopic inclusions with a tetragonal <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi>L</mi><msub><mn>6</mn><mn>0</mn></msub></mrow></math> structure in the cubic matrix of the alloy. However, no evidence for the presence of this phase in the bulk of the alloys in amounts sufficient to have a noticeable effect on the magnitude of magnetostriction has been obtained so far. To test this hypothesis, a detailed scanning of the reciprocal space of <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi mathvariant=\\\"normal\\\">F</mi><msub><mi mathvariant=\\\"normal\\\">e</mi><mn>81</mn></msub><mi mathvariant=\\\"normal\\\">G</mi><msub><mi mathvariant=\\\"normal\\\">a</mi><mn>19</mn></msub><mi mathvariant=\\\"normal\\\">T</mi><msub><mi mathvariant=\\\"normal\\\">b</mi><mrow><mn>0.1</mn></mrow></msub></mrow></math> and <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><msub><mi>Fe</mi><mn>73</mn></msub><msub><mi>Ga</mi><mn>27</mn></msub></mrow></math> single crystals was carried out at ESRF at high photon flux stations. In particular, it was possible to reliably record superstructure diffraction peaks, the intensity of which was at a level of <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mn>2</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>6</mn></mrow></msup></mrow></math> from the intensity of the fundamental peaks. Nevertheless, neither the presence of superstructure diffraction peaks obviously belonging to the <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi>L</mi><msub><mn>6</mn><mn>0</mn></msub></mrow></math> phase nor the tetragonal splitting of the fundamental diffraction peaks into components, which could indicate the presence of this phase in the samples, was detected. Similar results were obtained using complementary methods (electron and neutron diffraction). Based on the performed analysis of the background level in the places of the expected positions of superstructure peaks of the <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi>L</mi><msub><mn>6</mn><mn>0</mn></msub></mrow></math> phase, it was found that the volume fraction of this phase in the <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mrow><mi mathvariant=\\\"normal\\\">F</mi><msub><mi mathvariant=\\\"normal\\\">e</mi><mn>81</mn></msub><mi mathvariant=\\\"normal\\\">G</mi><msub><mi mathvariant=\\\"normal\\\">a</mi><mn>19</mn></msub><mi mathvariant=\\\"normal\\\">T</mi><msub><mi mathvariant=\\\"normal\\\">b</mi><mrow><mn>0.1</mn></mrow></msub></mrow></math> alloy cannot exceed 0.2 %. The presence of a previously discovered <math xmlns=\\\"http://www.w3.org/1998/Math/MathML\\\"><mi>X</mi></math> phase with hexagonal or orthorhombic symmetry in a crystal with 27 at. % Ga was confirmed.\",\"PeriodicalId\":20545,\"journal\":{\"name\":\"Physical Review Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-07-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physical Review Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1103/physrevmaterials.8.073604\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1103/physrevmaterials.8.073604","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Tetragonal phases in Fe-Ga alloys: A quantitative study
Currently, the dominant model for the formation of enhanced magnetostriction of Fe-Ga alloys is based on the assumption of the presence of microscopic inclusions with a tetragonal structure in the cubic matrix of the alloy. However, no evidence for the presence of this phase in the bulk of the alloys in amounts sufficient to have a noticeable effect on the magnitude of magnetostriction has been obtained so far. To test this hypothesis, a detailed scanning of the reciprocal space of and single crystals was carried out at ESRF at high photon flux stations. In particular, it was possible to reliably record superstructure diffraction peaks, the intensity of which was at a level of from the intensity of the fundamental peaks. Nevertheless, neither the presence of superstructure diffraction peaks obviously belonging to the phase nor the tetragonal splitting of the fundamental diffraction peaks into components, which could indicate the presence of this phase in the samples, was detected. Similar results were obtained using complementary methods (electron and neutron diffraction). Based on the performed analysis of the background level in the places of the expected positions of superstructure peaks of the phase, it was found that the volume fraction of this phase in the alloy cannot exceed 0.2 %. The presence of a previously discovered phase with hexagonal or orthorhombic symmetry in a crystal with 27 at. % Ga was confirmed.
期刊介绍:
Physical Review Materials is a new broad-scope international journal for the multidisciplinary community engaged in research on materials. It is intended to fill a gap in the family of existing Physical Review journals that publish materials research. This field has grown rapidly in recent years and is increasingly being carried out in a way that transcends conventional subject boundaries. The journal was created to provide a common publication and reference source to the expanding community of physicists, materials scientists, chemists, engineers, and researchers in related disciplines that carry out high-quality original research in materials. It will share the same commitment to the high quality expected of all APS publications.