The magnetic, electrical and structural properties of copper-permalloy alloys

被引:18
作者
Qader, Makram A. [1 ]
Vishina, Alena [2 ]
Yu, Lei [1 ]
Garcia, Cougar [3 ]
Singh, R. K. [3 ]
Rizzo, N. D. [4 ]
Huang, Mengchu [3 ]
Chamberlin, Ralph [5 ]
Belashchenko, K. D. [6 ,7 ]
van Schilfgaarde, Mark [2 ]
Newman, N. [1 ,3 ]
机构
[1] Arizona State Univ, Elect Engn Dept, Tempe, AZ 85287 USA
[2] Kings Coll London, London WC2R 2LS, England
[3] Arizona State Univ, SEMTE, Mat Program, Tempe, AZ 85287 USA
[4] Northrop Grumman Corp, Linthicum, MD 21090 USA
[5] Arizona State Univ, Dept Phys, Tempe, AZ 85287 USA
[6] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA
[7] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA
基金
英国工程与自然科学研究理事会;
关键词
Nickel alloys - Saturation magnetization - Electronic structure - Copper alloys - Temperature;
D O I
10.1016/j.jmmm.2017.06.081
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Copper-permalloy [Cu-1 (x)(Ni80Fe20)(x)] alloy films were deposited by co-sputtering and their chemical, structural, magnetic, and electrical properties were characterized. These films are found to have favorable weak ferromagnetic properties for low temperature magnetoelectronic applications. Our results show that by varying the composition, the saturation magnetization (M-s) can be tuned from 700 emu/cm(3) to 0 and the Curie temperature (T-c), can be adjusted from 900 K to 0 K. The M-s and T-c are found to scale linearly between x = 25% and 100%. Electronic structure calculations are used to provide a strong fundamental understanding of the mechanisms responsible for establishing the observed electrical and magnetic properties. The theoretical results also show that the introduction of Cu into the permalloy lattice results in very strong spin scattering in the minority spin channel, with only moderate interactions in the majority channel. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:45 / 52
页数:8
相关论文
共 30 条
[1]   Switching at small magnetic fields in Josephson junctions fabricated with ferromagnetic barrier layers [J].
Abd El Qader, Makram ;
Singh, R. K. ;
Galvin, Sarah N. ;
Yu, L. ;
Rowell, J. M. ;
Newman, N. .
APPLIED PHYSICS LETTERS, 2014, 104 (02)
[2]   Why Ni3Al is an itinerant ferromagnet but Ni3Ga is not -: art. no. 147201 [J].
Aguayo, A ;
Mazin, II ;
Singh, DJ .
PHYSICAL REVIEW LETTERS, 2004, 92 (14) :147201-1
[3]   EXPLICIT, 1ST-PRINCIPLES TIGHT-BINDING THEORY [J].
ANDERSEN, OK ;
JEPSEN, O .
PHYSICAL REVIEW LETTERS, 1984, 53 (27) :2571-2574
[4]   ILLUSTRATION OF THE LINEAR-MUFFIN-TIN-ORBITAL TIGHT-BINDING REPRESENTATION - COMPACT ORBITALS AND CHARGE-DENSITY IN SI [J].
ANDERSEN, OK ;
PAWLOWSKA, Z ;
JEPSEN, O .
PHYSICAL REVIEW B, 1986, 34 (08) :5253-5269
[5]   On the calculation of exchange interactions in metals [J].
Antropov, VP ;
van Schilfgaarde, M ;
Brink, S ;
Xu, JL .
JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)
[6]   CRITERION FOR FERROMAGNETISM FROM OBSERVATIONS OF MAGNETIC ISOTHERMS [J].
ARROTT, A .
PHYSICAL REVIEW, 1957, 108 (06) :1394-1396
[7]   Hybrid superconducting-magnetic memory device using competing order parameters [J].
Baek, Burm ;
Rippard, William H. ;
Benz, Samuel P. ;
Russek, Stephen E. ;
Dresselhaus, Paul D. .
NATURE COMMUNICATIONS, 2014, 5
[8]   EDDY-CURRENT METHOD FOR MEASURING THE RESISTIVITY OF METALS [J].
BEAN, CP ;
DEBLOIS, RW ;
NESBITT, LB .
JOURNAL OF APPLIED PHYSICS, 1959, 30 (12) :1976-1980
[9]   SPIN-GLASSES - EXPERIMENTAL FACTS, THEORETICAL CONCEPTS, AND OPEN QUESTIONS [J].
BINDER, K ;
YOUNG, AP .
REVIEWS OF MODERN PHYSICS, 1986, 58 (04) :801-976
[10]  
Bozorth R., 1951, Ferromagntism, P154