{"title":"接近临界浓度的二元合金 Ni1-xMox 和 Ni1-yCuy 的磁性能","authors":"","doi":"10.1016/j.physb.2024.416524","DOIUrl":null,"url":null,"abstract":"<div><p>The search for the ferromagnetic quantum critical point (FM QCP) has always been a captivating research topic in the scientific community. In pursuit of this goal, we introduced nonmagnetic transition metals to alloy with elemental nickel, and studied the magnetic properties of nickel binary alloys Ni<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>Mo<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span> and Ni<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>y</mi></mrow></msub></math></span>Cu<span><math><msub><mrow></mrow><mrow><mi>y</mi></mrow></msub></math></span> as a function of <span><math><mi>x</mi></math></span> and <span><math><mi>y</mi></math></span> up to the critical concentrations <span><math><msub><mrow><mi>x</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>y</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span> at which the FM transition <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>C</mi></mrow></msub></math></span> disappears. <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>C</mi></mrow></msub><mo>−</mo><mi>x</mi><mrow><mo>(</mo><mi>y</mi><mo>)</mo></mrow></mrow></math></span> phase diagrams were constructed via the Arrott–Noakes scaling of magnetization data. An enhanced Sommerfeld coefficient (the value of <span><math><mrow><mi>C</mi><mo>/</mo><mi>T</mi></mrow></math></span> as <span><math><mrow><mi>T</mi><mo>→</mo><mn>0</mn></mrow></math></span>) is observed near <span><math><msub><mrow><mi>x</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>y</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span>, manifesting the effect of quantum fluctuations. However, the spin glass behavior is identified through the ac magnetic susceptibility measurements. This observation rules out the possibility of the existence of the FM QCP in both systems.</p></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic properties of binary alloys Ni1−xMox and Ni1−yCuy close to critical concentrations\",\"authors\":\"\",\"doi\":\"10.1016/j.physb.2024.416524\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The search for the ferromagnetic quantum critical point (FM QCP) has always been a captivating research topic in the scientific community. In pursuit of this goal, we introduced nonmagnetic transition metals to alloy with elemental nickel, and studied the magnetic properties of nickel binary alloys Ni<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>Mo<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span> and Ni<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>y</mi></mrow></msub></math></span>Cu<span><math><msub><mrow></mrow><mrow><mi>y</mi></mrow></msub></math></span> as a function of <span><math><mi>x</mi></math></span> and <span><math><mi>y</mi></math></span> up to the critical concentrations <span><math><msub><mrow><mi>x</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>y</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span> at which the FM transition <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>C</mi></mrow></msub></math></span> disappears. <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>C</mi></mrow></msub><mo>−</mo><mi>x</mi><mrow><mo>(</mo><mi>y</mi><mo>)</mo></mrow></mrow></math></span> phase diagrams were constructed via the Arrott–Noakes scaling of magnetization data. An enhanced Sommerfeld coefficient (the value of <span><math><mrow><mi>C</mi><mo>/</mo><mi>T</mi></mrow></math></span> as <span><math><mrow><mi>T</mi><mo>→</mo><mn>0</mn></mrow></math></span>) is observed near <span><math><msub><mrow><mi>x</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>y</mi></mrow><mrow><mi>c</mi><mi>r</mi></mrow></msub></math></span>, manifesting the effect of quantum fluctuations. However, the spin glass behavior is identified through the ac magnetic susceptibility measurements. This observation rules out the possibility of the existence of the FM QCP in both systems.</p></div>\",\"PeriodicalId\":20116,\"journal\":{\"name\":\"Physica B-condensed Matter\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-09-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physica B-condensed Matter\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0921452624008652\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, CONDENSED MATTER\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica B-condensed Matter","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921452624008652","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
Magnetic properties of binary alloys Ni1−xMox and Ni1−yCuy close to critical concentrations
The search for the ferromagnetic quantum critical point (FM QCP) has always been a captivating research topic in the scientific community. In pursuit of this goal, we introduced nonmagnetic transition metals to alloy with elemental nickel, and studied the magnetic properties of nickel binary alloys NiMo and NiCu as a function of and up to the critical concentrations and at which the FM transition disappears. phase diagrams were constructed via the Arrott–Noakes scaling of magnetization data. An enhanced Sommerfeld coefficient (the value of as ) is observed near and , manifesting the effect of quantum fluctuations. However, the spin glass behavior is identified through the ac magnetic susceptibility measurements. This observation rules out the possibility of the existence of the FM QCP in both systems.
期刊介绍:
Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work.
Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas:
-Magnetism
-Materials physics
-Nanostructures and nanomaterials
-Optics and optical materials
-Quantum materials
-Semiconductors
-Strongly correlated systems
-Superconductivity
-Surfaces and interfaces