Investigation of magnetic tunneling junctions with wedge-shaped barrier

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	Investigation of magnetic tunneling junctions with wedge-shaped barrier
	Du, J ; Xiang, XH ; Landry, G ; You, B ; Hu, A ; Zhao, HW ; Xiao, JQ
刊名	JOURNAL OF APPLIED PHYSICS
	2002
卷号	91 期号:10 页码:8780
关键词	MAGNETORESISTANCE CONDUCTANCE DEPENDENCE AL
ISSN号	0021-8979
通讯作者	Du, J: Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.
中文摘要	LaFe13-xSix compounds with x=2.4, 2.6, and 2.8 have been carefully prepared and characterized. X-ray powder diffraction patterns confirm that the samples crystallize in a single NaZn13-type phase. Magnetic measurements were carried out in a SQUID magnetometer. The Curie temperature T-c of LaFe13-xSix samples decreases nearly 50 K with x increasing from 2.4 to 2.8. Around T-c the samples exhibit a typical second-order phase transition; and no trace of first-order itinerant electron metamagnetic transition is found. So it is reliable to characterize the magnetic entropy change around T-c using magnetic measurement. The maximum values of the magnetic entropy change of LaFe13-xSix samples are found to be, at their Curie temperatures, 5.85, 5.9, and 3.7 J/kg.K for x=2.4, 2.6, and 2.8 under a field change of 5 T (0-5 T). For the quite large magnetic entropy change over a wide temperature range, LaFe13-xSix compounds appear, therefore, to be a potential material candidate for magnetic cooling. (C) 2002 American Institute of Physics.
收录类别	SCI
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40275]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Du, J,Xiang, XH,Landry, G,et al. Investigation of magnetic tunneling junctions with wedge-shaped barrier[J]. JOURNAL OF APPLIED PHYSICS,2002,91(10):8780.
APA	Du, J.,Xiang, XH.,Landry, G.,You, B.,Hu, A.,...&Xiao, JQ.(2002).Investigation of magnetic tunneling junctions with wedge-shaped barrier.JOURNAL OF APPLIED PHYSICS,91(10),8780.
MLA	Du, J,et al."Investigation of magnetic tunneling junctions with wedge-shaped barrier".JOURNAL OF APPLIED PHYSICS 91.10(2002):8780.