Magnetic orderings in Al nanowires suspended between electrodes

Ono, Tomoya; Tsukamoto, Shigeru; Hirose, Kikuji
June 2003
Applied Physics Letters;6/23/2003, Vol. 82 Issue 25, p4570
Academic Journal
A theoretical analysis of a relation between atomic and spin-electronic structures for the ground state of single-row aluminum nanowires suspended between Al(001) electrodes is demonstrated using first-principles structural optimizations. We obtain an unusual result that a three-aluminum-atom nanowire sandwiched between the electrodes does not manifest magnetic ordering, although an isolated aluminum trimer molecule in a straight line is spin-polarized. On the other hand, a five-atom nanowire exhibits ferromagnetic ordering, where three central atoms form a spin-polarized trimer. Moreover, in the case of an eight-atom nanowire, the middle atoms in the nanowire form two spin-polarized trimers with antiferromagnetic ordering.


Related Articles

  • Heat-assisted magnetization switching in elongated submicrometer Permalloy structures. Atkinson, D.; Cowburn, R. P. // Applied Physics Letters;8/23/2004, Vol. 85 Issue 8, p1386 

    The effect on switching behavior of locally heating individual Permalloy nanostructures is reported. The samples consisted of isolated magnetic structures with an aluminum conducting strip on top at one end of each structure, through which direct current passed to heat the nanostructure....

  • Ag nanowires and its application as electrode materials in electrochemical capacitor. Zhong-Ai Hu; Yao-Xian Wang; Yu-Long Xie; Yu-Ying Yang; Zi-Yu Zhang; Hong-Ying Wu // Journal of Applied Electrochemistry;Feb2010, Vol. 40 Issue 2, p341 

    Silver nanowires were synthesized on a large scale by using anodic aluminum oxide (AAO) film as templates and serving ethylene glycol as reductant. Their morphological and structural characterizations were characterized with field emission scanning electron microscopy (FESEM), transmission...

  • Structure and magnetic properties of hexagonal arrays of ferromagnetic nanowires. Hernández, Eduardo Padrón; Azevedo, A.; Rezende, S. M. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 7, p07B525 

    Here we present a model that explains a number of the magnetic properties of arrays of cylindrical ferromagnetic nanowires. The model properly considers the magnetostatic contributions from the wire inhomogeneities, here taken as a chain of ellipsoidal grains, as well as the dipolar interactions...

  • Combinational template-assisted fabrication of hierarchically ordered nanowire arrays on substrates for device applications. Chong, Maria A. S.; Zheng, Yue Bing; Gao, Han; Tan, Lee Kheng // Applied Physics Letters;12/4/2006, Vol. 89 Issue 23, p233104 

    By combining two self-organized templates, the authors fabricate hierarchically ordered nanowire arrays on substrates. The nanowire arrays consist of periodic voids at the microscale and hexagonally packed nanowires at the nanoscale. The nanowires are created by selective electrodeposition using...

  • Ferromagnetic nanotubes by atomic layer deposition in anodic alumina membranes. Daub, M.; Knez, M.; Goesele, U.; Nielsch, K. // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09J111 

    In this paper, two methods for the synthesis of magnetic nanotubes inside the pores of anodic alumina membranes by atomic layer deposition (ALD) are compared. The precursors were nickelocene or cobaltocene, and H2O or O3. The first method consists of a three-step ALD cycle: First, the sample is...

  • Engineering the magnetic properties of Ge1-xMnx nanowires. Kazakova, Olga; Kulkarni, Jaideep S.; Arnold, Donna C.; Holmes, Justin D. // Journal of Applied Physics;5/1/2007, Vol. 101 Issue 9, p09H108 

    Possible origins of room-temperature ferromagnetism in GeMn nanowires (NWs) are investigated. Arrays of Ge1-xMnx NWs and Ge/Ge1-xMnx nanocables (NCs) (x=1%–5%) have been synthesized within the pores of anodized alumina oxide (AAO) membranes. The influence of annealing on the magnetic...

  • Synthesis and characterization of Co2FeAl nanowires. Sapkota, Keshab R.; Gyawali, Parshu; Forbes, Andrew; Pegg, Ian L.; Philip, John // Journal of Applied Physics;Jun2012, Vol. 111 Issue 12, p123906 

    We report the growth and characterization of Co2FeAl nanowires. Nanowires are grown using electrospinning method and the diameters range from 50 to 500 nm. These nanowires exhibit cubic crystal structure with a lattice constant of a=5.639 Ã…. The nanowires exhibit ferromagnetic behavior with...

  • Tunable Magnetic Properties of Heterogeneous Nanobrush: From Nanowire to Nanofilm. Ren, Y.; Dai, Y. Y.; Zhang, B.; Liu, Q. F.; Xue, D. S.; Wang, J. B. // Nanoscale Research Letters;May2010, Vol. 5 Issue 5, p853 

    With a bottom-up assemble technology, heterogeneous magnetic nanobrushes, consisting of Co nanowire arrays and ferromagnetic Fe70Co30 nanofilm, have been fabricated using an anodic aluminum oxide template method combining with sputtering technology. Magnetic measurement suggests that the...

  • Fabrication of ordered array of nanowires of La[sub 0.67]Ca[sub 0.33]MnO[sub 3] (x=0.33) in alumina templates with enhanced ferromagnetic transition temperature. Shankar, K. Shantha; Kar, Sohini; Raychaudhuri, A.K.; Subbanna, G.N. // Applied Physics Letters;2/9/2004, Vol. 84 Issue 6, p993 

    We report fabrication of array of crystalline nanowires (average diameter of 65 nm) of colossal magnetoresistive oxide La[sub 0.67]Ca[sub 0.33]MnO[sub 3] (LCMO, x=0.33) within anodized alumina templates by filling the pores with a sol that allows formation of LCMO phase at the relatively low...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics