Unusual ZFC and FC magnetic behavior in thin Co multi-layered structure

被引：6

作者：

Ben-Dor, Oren ^{[1
]}

Yochelis, Shira ^{[1
]}

Felner, Israel ^{[2
]}

Paltiel, Yossi ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Dept Appl Phys, Ctr Nanosci & Nanotechnol, IL-91904 Jerusalem, Israel

[2] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 428卷

关键词：

Unusual Magnetic behavior; ZFC > FC; Multi-layered thin Co films; Chiral magnetic memory; MEMORY DEVICE;

D O I：

10.1016/j.jmmm.2016.12.104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The observation of unusual magnetic phenomena in a Ni -based magnetic memory device ([4] O. Ben-Dor et al., 2013) encouraged us to conduct a systematic research on Co based multi-layered structure which contains a ahelix L polyalanine (AHPA-L) organic compound. The constant Co thickness is 7 nm and AHPA-L was also replaced by non-chiral 1-Decanethiol organic molecules. Both organic compounds were chemisorbed on gold by a thiol group. The dc magnetic field (H) was applied parallel and perpendicular to the surface layers. The perpendicular direction is the easy magnetization axis and along this orientation only, the zero-field-cooled (ZFC) plots exhibit a pronounced peak around 55-58 K. This peak is suppressed in the second ZFC and fieldcooled (FC) runs performed shortly after the virgin ZFC one. Thus, around the peak position ZFC > FC a phenomenon seldom observed. This peak reappears after measuring the same material six months later. This behavior appears in layers with the non-chiral 1-Decanethiol and it is very similar to that obtained in sulfur doped amorphous carbon. The peak origin and the peculiar ZFC > FC case are qualitatively explained.

引用

页码：357 / 361

页数：5

共 13 条

[1] Origin of magnetic moments in carbon nanofoam [J].

Arcon, D. ;

Jaglicic, Z. ;

Zorko, A. ;

Rode, A. V. ;

Christy, A. G. ;

Madsen, N. R. ;

Gamaly, E. G. ;

Luther-Davies, B. .

PHYSICAL REVIEW B, 2006, 74 (01)

[2] Magnetism of adsorbed oxygen on carbon nanohorns [J].

Bandow, S ;

Yamaguchi, T ;

Iijima, S .

CHEMICAL PHYSICS LETTERS, 2005, 401 (4-6) :380-384

[3] Magnetic order and superconductivity observed in bundles of double-wall carbon nanotubes [J].

Barzola-Quiquia, J. ;

Esquinazi, P. ;

Linde, M. ;

Spemann, D. ;

Muallem, M. ;

Nessim, G. D. .

CARBON, 2015, 88 :16-25

[4] A chiral-based magnetic memory device without a permanent magnet [J].

Ben Dor, Oren ;

Yochelis, Shira ;

Mathew, Shinto P. ;

Naaman, Ron ;

Paltiel, Yossi .

NATURE COMMUNICATIONS, 2013, 4

[5] Unusual magnetic behavior in a chiral-based magnetic memory device [J].

Ben-Dor, Oren ;

Yochelis, Shira ;

Felner, Israel ;

Paltiel, Yossi .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2016, 398 :259-263

[6] Conventional superconductivity at 203 kelvin at high pressures in the sulfur hydride system [J].

Drozdov, A. P. ;

Eremets, M. I. ;

Troyan, I. A. ;

Ksenofontov, V. ;

Shylin, S. I. .

NATURE, 2015, 525 (7567) :73-+

[7] Peculiar magnetic observations in pathological human liver [J].

Felner, I. ;

Alenkina, I. V. ;

Vinogradov, A. V. ;

Oshtrakh, M. I. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2016, 399 :118-122

[8] Superconductivity and unusual magnetic behavior in amorphous carbon [J].

Felner, Israel .

MATERIALS RESEARCH EXPRESS, 2014, 1 (01)

[9]

Imri J., 1975, PHYS REV LETT, V35, P1399

[10] Low-temperature magnetization and AC susceptibility of magnetite: effect of thermomagnetic history [J].

Kosterov, A .

GEOPHYSICAL JOURNAL INTERNATIONAL, 2003, 154 (01) :58-71

← 1 2 →