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Multiple magnetic transitions and magnetocaloric effect of Tb_(4)Coln alloy

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Journal of Rare Earths 2023年第11期41卷 1721-1727,I0003页

作者： Remya U.D. Arun K. swathi s. Athul s.R. Andrea Dzubinska Marian reiffers Nagalakshmi R. Intermetallics and Non-linear Optics Laboratory Department of PhysicsNational Institute of TechnologyTiruchirappalli620015India CPM-TIP University Pavol Jozef Safarik04011KošiceSlovakia Faculty of Humanities and Natural sciences Presov UniversityPresovSlovakia Institute of Experimental Physics SASKosiceSlovakia

We report on the magnetic,magnetocaloric,thermal,and electrical transport properties of Tb_(4)Coln alloy,which crystallizes in two phases,Tb_6Co_(2.1)In_(0.8)(space group Immm)and Tb_(2)In_(0.9)Co_(0.1)(space group P6_(3)/mmc),respectively.The alloy reveals three successive magnetic transitions around T_(1)(163 K),T_(2)(50 K),and T_(3)(29 K),respectively,associated with paramagnetic to ferromagnetic transition and two sequential antiferromagnetic transitions.The low-temperature transition T_(3) follows the first-order magnetic behavior and exhibits the field-induced magnetic transition.Meanwhile,T_(2) and T_(1) are found to be second-order in nature which opens a possibility for hysteresis-free magnetocaloric application.The magnetocaloric properties are determined using different magnetocaloric figures of merits such as-Δs_(M),ΔT_(ad).RCP,and TEC(10).Additionally,the universal curve behavior in the isothermal entropy change unveils the variation in critical exponents around T_(1) and T_(2) due to the magnetic inhomogeneity in the alloy.Besides,the electrical transport properties of the metallic alloy denote the maximum magnetoresistance of-10%around T_(1).

关键词： Multiple magnetic transitions Order of magnetic transition Magnetocaloric effect Magnetoresistance Universal curve behavior Rare earths

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Magnetocaloric and magneto-transport properties of Gd_(10)Co_(20)si_(70) alloy

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Journal of Rare Earths 2019年第1期37卷 74-79,M0004页

作者： T.P.Rashid K.Arun Ivan Curlik sergej Ilkovic Marian reiffers ANDrea Dzubinska R.Nagalakshmi Intermetallics and Non-Linear Optics Laboratory Department of Physics National Institute of Technology(India) Faculty of Humanities and Natural sciences Presov University Faculty of Natural sciences P.J.Safarik University

We report the results of magnetic, thermodynamic, transport and magnetocaloric effect (MCE) studies of newly synthesized Gd_(10)Co_(20)si_(70) alloy. These measurements confirm an antiferromagnetic transition at T_N=9 K. Both MCE and magnetoresistance (MR) show quadratic dependence on the applied magnetic field, indicating the presence of spin fluctuations in the alloy. The maximum values of the magnetic entropy change determined from the isothermal magnetization data for magnetic field change of 7 and9 T are found to be 10.5 and 15.6 J/kg·K, respectively. As a consequence of the spin fluctuations effect, the MCE peaks are pulled towards high temperature side as asymmetrically broadened peak. The MR attains a large positive value of 73%at 2 K in 8 T. The large MR and reversible MCE make this alloy an attractive multifunctional magnetic material.

关键词： Rare earth-transition metal alloy Magnetic properties Magnetocaloric effect Magnetoresistance spin fluctuations

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急性髓母细胞性白血病——诱导治疗期感染并发症在本病预后方面的意义

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昆明医科大学学报 1981年第S1期 22-27页

作者： J.reiffers 罗应昌

本文将88个患急性髓母细胞性白血病的病例列为一均组,评述并分析了在诱导治疗期内感染的特征及其对预后的意义。认为感染出现的日期甚为重要:初期的《严重》感染,晚期在药物性骨髓中毒高峰后出现的感染皆导致本病的预后不良,在治疗性骨... 详细信息

本文将88个患急性髓母细胞性白血病的病例列为一均组,评述并分析了在诱导治疗期内感染的特征及其对预后的意义。认为感染出现的日期甚为重要:初期的《严重》感染,晚期在药物性骨髓中毒高峰后出现的感染皆导致本病的预后不良,在治疗性骨髓抑制的第二阶段中,若感染能控制,则预示本病的治疗常能得到完全缓解,相反,则证实化疗失败。最后,还评述到,一旦达到完全缓解,任何感染因素都不影响本病患者的存活期。

关键词：诱导治疗完全缓解率并发症并发病疾病骨髓抑制预后

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老年人急性原粒细胞白血病的治疗及预后因素

国外医学.输血及血液学分册 1981年第3期 187-188页

作者：王信琪

1975年6月～1978年6月收治60岁以上初治的急粒患者34例,5例未治疗,余29例分三组:第一组19例用 Ara-c(100mg/m~3/天×7)加 DNR(45mg/m~2/天×3,iv)诱导,第二组6例,用 Ara-c(75mg/m~2/天×4)加 DNR(30mg/m~2/天×2,iv)诱导,第三组4例,均有心衰,用 Ara-c 加甲基乙二醇诱导。完全缓解(CR)后即行维持治疗,即每月用 Ara-c(100mg/m~2/天×5)交替与6-MP(100mg/m~2/天P.O.×5)、CTX(600mg/m~2×1 iv)或 DNR(40mg/m~2/天×2,iv)联合化疗一次。头两月内复发者为诱导失败。

关键词：粒细胞 CR DNR 白细胞再障老年人