Evidence of antiferromagnetic interactions in iron-implanted kapton

M. Ohkubo; Naoto Kobayashi; N. Hayashi

doi:10.1016/0038-1098(94)90888-5

Evidence of antiferromagnetic interactions in iron-implanted kapton

M. Ohkubo, Naoto Kobayashi, N. Hayashi

Research output: Contribution to journal › Article › peer-review

Abstract

Iron ions were implanted into a polymer, Kapton, at 300 keV to a dose of 10¹⁷ atoms cm^-2 in order to modify magnetic properties. Magnetization curves were measured by a superconducting quantum interference device magnetometer at 4.2, 77 and 300 K in fields up to 40 kG. The as-implanted sample exhibits paramagnetic behaviour at all temperatures. Annealing in vacuum caused ferromagnetic behaviour at 4.2 K. Unexpectantly, it has been found that the magnetic moments of all samples are abnormally small at low temperatures. The magnetization curves can be explained by taking into account the existence of magnetic clusters and free iron ions with antiferromagnetic interactions.

Original language	English
Pages (from-to)	261-265
Number of pages	5
Journal	Solid State Communications
Volume	92
Issue number	3
DOIs	https://doi.org/10.1016/0038-1098(94)90888-5
Publication status	Published - 1994
Externally published	Yes

Keywords

A. disordered system A. polymers
and ion impact
and plastics A. spin glasses D. radiation effects E. atom
elastomers
molecule

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

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title = "Evidence of antiferromagnetic interactions in iron-implanted kapton",

abstract = "Iron ions were implanted into a polymer, Kapton, at 300 keV to a dose of 1017 atoms cm-2 in order to modify magnetic properties. Magnetization curves were measured by a superconducting quantum interference device magnetometer at 4.2, 77 and 300 K in fields up to 40 kG. The as-implanted sample exhibits paramagnetic behaviour at all temperatures. Annealing in vacuum caused ferromagnetic behaviour at 4.2 K. Unexpectantly, it has been found that the magnetic moments of all samples are abnormally small at low temperatures. The magnetization curves can be explained by taking into account the existence of magnetic clusters and free iron ions with antiferromagnetic interactions.",

keywords = "A. disordered system A. polymers, and ion impact, and plastics A. spin glasses D. radiation effects E. atom, elastomers, molecule",

author = "M. Ohkubo and Naoto Kobayashi and N. Hayashi",

year = "1994",

doi = "10.1016/0038-1098(94)90888-5",

language = "English",

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pages = "261--265",

journal = "Solid State Communications",

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T1 - Evidence of antiferromagnetic interactions in iron-implanted kapton

AU - Ohkubo, M.

AU - Kobayashi, Naoto

AU - Hayashi, N.

PY - 1994

Y1 - 1994

N2 - Iron ions were implanted into a polymer, Kapton, at 300 keV to a dose of 1017 atoms cm-2 in order to modify magnetic properties. Magnetization curves were measured by a superconducting quantum interference device magnetometer at 4.2, 77 and 300 K in fields up to 40 kG. The as-implanted sample exhibits paramagnetic behaviour at all temperatures. Annealing in vacuum caused ferromagnetic behaviour at 4.2 K. Unexpectantly, it has been found that the magnetic moments of all samples are abnormally small at low temperatures. The magnetization curves can be explained by taking into account the existence of magnetic clusters and free iron ions with antiferromagnetic interactions.

AB - Iron ions were implanted into a polymer, Kapton, at 300 keV to a dose of 1017 atoms cm-2 in order to modify magnetic properties. Magnetization curves were measured by a superconducting quantum interference device magnetometer at 4.2, 77 and 300 K in fields up to 40 kG. The as-implanted sample exhibits paramagnetic behaviour at all temperatures. Annealing in vacuum caused ferromagnetic behaviour at 4.2 K. Unexpectantly, it has been found that the magnetic moments of all samples are abnormally small at low temperatures. The magnetization curves can be explained by taking into account the existence of magnetic clusters and free iron ions with antiferromagnetic interactions.

KW - A. disordered system A. polymers

KW - and ion impact

KW - and plastics A. spin glasses D. radiation effects E. atom

KW - elastomers

KW - molecule

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