ID :
54613
Thu, 04/09/2009 - 15:40
Auther :
Shortlink :
https://oananews.org//node/54613
The shortlink copeid
S. Korean scientists observe critical phenomena between dimensions
SEOUL, April 9 (Yonhap) -- South Korean scientists said Thursday they have observed firsthand so-called "critical phenomena" where qualities of both the first and second dimensions coexist.
The team, led by Choe Sug-bong of Seoul National University and POSTECH's Lee
Hyun-woo, used a superfine film made from a composite cobalt-iron alloy to show
that when a material from the second dimension is transformed into a first
dimensional object, distinct qualities of both can be seen simultaneously.
The second dimension refers to a world made of a flat plain, where an imaginary
person could look in all directions except up and down. A first dimensional world
is a single line where only the front and back can be observed.
The findings, published in the latest Internet issue of Nature, are the first
observations of this phenomena made in physics and have been hailed as an
important first step that can contribute to the development of physics.
The two physicists said they cut the width of the alloy so the plain would
effectively become a single line, and by applying an external magnetic field and
changing its strength, they observed the expansion speed of the magnetic domain
wall. A specially built scanning magnetic microscope was used for the
observation.
Choe said that when the film was 4.2 micro meters to 756 nanometers wide, the
domain walls showed all the distinct characteristics of objects in the second
dimension, but after the film was cut to a width of under 150 nanometers, the
characteristics were those seen in first dimensional objects.
"However, when the thickness of the film was between 500-150 nanometers, we
observed characteristics of both," the professor said, adding that before the
experiments began, no one expected to see properties of both the first and second
dimensions to appear in the 500-150 nanometer range.
A micrometer is one-millionth of a meter, while a nanometer is equivalent to
one-billionth of a meter.
The Ministry for Education, Science and Technology, which funded the research,
said that while the discovery mainly helps explain an unobserved phenomena that
has eluded scientists in the past, it could also provide valuable data in the
development of next-generation nano-based technologies that can be used to make
advanced electronic devices and spur industrial development.
yonngong@yna.co.kr
(END)
The team, led by Choe Sug-bong of Seoul National University and POSTECH's Lee
Hyun-woo, used a superfine film made from a composite cobalt-iron alloy to show
that when a material from the second dimension is transformed into a first
dimensional object, distinct qualities of both can be seen simultaneously.
The second dimension refers to a world made of a flat plain, where an imaginary
person could look in all directions except up and down. A first dimensional world
is a single line where only the front and back can be observed.
The findings, published in the latest Internet issue of Nature, are the first
observations of this phenomena made in physics and have been hailed as an
important first step that can contribute to the development of physics.
The two physicists said they cut the width of the alloy so the plain would
effectively become a single line, and by applying an external magnetic field and
changing its strength, they observed the expansion speed of the magnetic domain
wall. A specially built scanning magnetic microscope was used for the
observation.
Choe said that when the film was 4.2 micro meters to 756 nanometers wide, the
domain walls showed all the distinct characteristics of objects in the second
dimension, but after the film was cut to a width of under 150 nanometers, the
characteristics were those seen in first dimensional objects.
"However, when the thickness of the film was between 500-150 nanometers, we
observed characteristics of both," the professor said, adding that before the
experiments began, no one expected to see properties of both the first and second
dimensions to appear in the 500-150 nanometer range.
A micrometer is one-millionth of a meter, while a nanometer is equivalent to
one-billionth of a meter.
The Ministry for Education, Science and Technology, which funded the research,
said that while the discovery mainly helps explain an unobserved phenomena that
has eluded scientists in the past, it could also provide valuable data in the
development of next-generation nano-based technologies that can be used to make
advanced electronic devices and spur industrial development.
yonngong@yna.co.kr
(END)
