{"title":"准自旋链化合物 Li2CuO2 的磁感应强度和热容量","authors":"Ashiwini Balodhi, Min Gyu Kim","doi":"10.1016/j.jmmm.2024.172617","DOIUrl":null,"url":null,"abstract":"<div><div>Magnetization and heat capacity (<span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>) measurements were performed on blade-shaped single crystals of Li<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>CuO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, a one-dimensional spin-chain compound synthesized via the flux method. The magnetization and heat capacity measurements confirm a long-range antiferromagnetic transition at <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>N</mi></mrow></msub></math></span> = 9.3 K. The magnetic susceptibility, <span><math><mi>χ</mi></math></span> with magnetic field applied parallel (<span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo><mi>b</mi></mrow></msub></math></span>) and perpendicular (<span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo><mi>b</mi></mrow></msub></math></span>) to the spin chain direction (crystallographic <span><math><mi>b</mi></math></span>-axis) is reported. <span><math><mrow><mi>χ</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> measurements reveal anisotropic behavior, with <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo><mi>b</mi></mrow></msub></math></span> <span><math><mrow><mo>></mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo><mi>b</mi></mrow></msub></mrow></math></span> in the temperature range <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>N</mi></mrow></msub><mo><</mo><mi>T</mi><mo><</mo><mn>350</mn></mrow></math></span> K, with a ratio of <span><math><mrow><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo></mrow></msub><mo>/</mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo></mrow></msub></mrow></math></span> = 1.15 at 300 K and with <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo><mi>b</mi></mrow></msub></math></span> <span><math><mrow><mo><</mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo><mi>b</mi></mrow></msub></mrow></math></span> at <span><math><mrow><mi>T</mi><mo>=</mo><mn>2</mn></mrow></math></span> K, with a ratio of <span><math><mrow><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo></mrow></msub><mo>/</mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo></mrow></msub></mrow></math></span> = 0.86 at 2 K. Unlike the previous studies reporting ferromagnetic components at low temperatures, we report the absence of a ferromagnetic ordering at low temperatures.</div></div>","PeriodicalId":366,"journal":{"name":"Journal of Magnetism and Magnetic Materials","volume":"611 ","pages":"Article 172617"},"PeriodicalIF":2.5000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic susceptibility and heat capacity of a quasi-spin chain compound, Li2CuO2\",\"authors\":\"Ashiwini Balodhi, Min Gyu Kim\",\"doi\":\"10.1016/j.jmmm.2024.172617\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Magnetization and heat capacity (<span><math><msub><mrow><mi>C</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>) measurements were performed on blade-shaped single crystals of Li<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>CuO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>, a one-dimensional spin-chain compound synthesized via the flux method. The magnetization and heat capacity measurements confirm a long-range antiferromagnetic transition at <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>N</mi></mrow></msub></math></span> = 9.3 K. The magnetic susceptibility, <span><math><mi>χ</mi></math></span> with magnetic field applied parallel (<span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo><mi>b</mi></mrow></msub></math></span>) and perpendicular (<span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo><mi>b</mi></mrow></msub></math></span>) to the spin chain direction (crystallographic <span><math><mi>b</mi></math></span>-axis) is reported. <span><math><mrow><mi>χ</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> measurements reveal anisotropic behavior, with <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo><mi>b</mi></mrow></msub></math></span> <span><math><mrow><mo>></mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo><mi>b</mi></mrow></msub></mrow></math></span> in the temperature range <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>N</mi></mrow></msub><mo><</mo><mi>T</mi><mo><</mo><mn>350</mn></mrow></math></span> K, with a ratio of <span><math><mrow><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo></mrow></msub><mo>/</mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo></mrow></msub></mrow></math></span> = 1.15 at 300 K and with <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo><mi>b</mi></mrow></msub></math></span> <span><math><mrow><mo><</mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo><mi>b</mi></mrow></msub></mrow></math></span> at <span><math><mrow><mi>T</mi><mo>=</mo><mn>2</mn></mrow></math></span> K, with a ratio of <span><math><mrow><msub><mrow><mi>χ</mi></mrow><mrow><mo>⊥</mo></mrow></msub><mo>/</mo><msub><mrow><mi>χ</mi></mrow><mrow><mo>∥</mo></mrow></msub></mrow></math></span> = 0.86 at 2 K. Unlike the previous studies reporting ferromagnetic components at low temperatures, we report the absence of a ferromagnetic ordering at low temperatures.</div></div>\",\"PeriodicalId\":366,\"journal\":{\"name\":\"Journal of Magnetism and Magnetic Materials\",\"volume\":\"611 \",\"pages\":\"Article 172617\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Magnetism and Magnetic Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0304885324009089\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Magnetism and Magnetic Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0304885324009089","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
对通过磁通量法合成的一维自旋链化合物 Li2CuO2 的叶片形单晶进行了磁化和热容（Cp）测量。磁化和热容测量证实了 TN = 9.3 K 时的长程反铁磁转变。报告了磁感应强度 χ 在与自旋链方向（晶体学 b 轴）平行（χ∥b）和垂直（χ⊥b）磁场下的变化情况。χ(T)测量显示了各向异性行为，在 TN<T<350 K 温度范围内，χ⊥b >χ∥b 的比率为 χ⊥/χ∥ = 1.15 ，在 300 K 时为 χ⊥b <χ∥b ，在 T=2 K 时为 χ⊥/χ∥ = 0.与之前报告低温下铁磁成分的研究不同，我们报告在低温下没有铁磁有序。
Magnetic susceptibility and heat capacity of a quasi-spin chain compound, Li2CuO2
Magnetization and heat capacity () measurements were performed on blade-shaped single crystals of LiCuO, a one-dimensional spin-chain compound synthesized via the flux method. The magnetization and heat capacity measurements confirm a long-range antiferromagnetic transition at = 9.3 K. The magnetic susceptibility, with magnetic field applied parallel () and perpendicular () to the spin chain direction (crystallographic -axis) is reported. measurements reveal anisotropic behavior, with in the temperature range K, with a ratio of = 1.15 at 300 K and with at K, with a ratio of = 0.86 at 2 K. Unlike the previous studies reporting ferromagnetic components at low temperatures, we report the absence of a ferromagnetic ordering at low temperatures.
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