New Physics: Sae Mulli

Aims and Scope

The origin of New Physics: Sae Mulli (NPSM, ISO abbreviation: New Phys.: Sae Mulli.): Sae Mulli (새물리 in Korean characters means ‘new physics’) is the oldest Korean pure scientific journal. It was first published in 1961 just after the Korean War by the Korean Physical Society (KPS). The primary mission of Sae Mulli was to start building up Korean physics research community from almost nothing and in fact Sae Mulli had made tremendous contributions to the Korean science community. Through a peer-review system, Sae Mulli had continued elevating the level of scientific researches, consequently becoming a cornerstone of the economic miracle of Korea...

Editor-in-Chief : Sunglae CHO
New Physics: Sae Mulli Editorial Board

pISSN : 0374-4914
eISSN : 2289-0041

Tel : +82-2-556-4737
Fax : +82-2-554-1643
E-mail: npsm@npsm-kps.org

Research Papers

Color Controls of TiO$_2$ Thin Films Grown on Half-Mirrored Stainless-Steel Substrates by Using the Facing Target Sputtering Method

Sung-Youp LEE¹, Hyeong-Rag LEE¹, Hong Tak KIM*¹, Hye Jin HA²

¹Department of Physics, Kyungpook National University, Daegu 41566, Korea

²Department of Science Education, Kyungpook National University, Daegu 41566, Korea

In this study, titanium oxide (TiO$_2$) thin films were deposited on stainless-steel and glass substrates by using a facing target sputtering method. As-deposited TiO$_2$ films exhibited an optical energy band-gap of 3.37 eV, a refractive index of 2.27 and an extinction coefficient of 0.19 at a wavelength of 550 nm. The color on the films was acquired by using the interference of light between the TiO$_2$ films and the reflective substrate, and also could be controlled from yellow to purple color by changing the thickness of the TiO$_2$ thin film. The above results, shown that color can be freely realized for a reflective substrate using TiO$_2$, which is relatively an environment-friendly material and that this approach can be applied in various fields requiring various color implementations.

New Phys.: Sae Mulli 2019; 69: 247-252

Magnetic Heat Effects of FeCoNi Nanoparticles Coated on Edge-Oxidized Graphene Sheets Under an Alternating Magnetic Field

Jinu KIM, Ki Hyeon KIM*, Taehoon KIM, Byungmun JUNG

Department of Physics, Yeungnam University, Gyeongsan 38541, Korea

To evaluate the self-heat behaviors of the FeCoNi magnetic nanoparticles decorated on edge-oxidized graphene (EOG) nanosheets, are deposited FeCoNi magnetic nanoparticles on EOG by using an electroless plate method. The mean diameter of the FeCoNi nanoparticles coated on EOG (FCNEOG) was approximately 45 nm. The saturation magnetization and coercivity of FCNEOG were 157 emu/g and 105 Oe, respectively. The heat elevations of the FCNEOG in silicon oil were measured at alternating magnetic fields of 75, 100, 125 Oe with frequencies of 155, 250 and 355 kHz, respectively, under an initial temperature of 25$^\circ$C. The maximum temperatures elevation increased from 38$^\circ$C to 46$^\circ$C at 125 Oe and 355 kHz at the concentration of FCNS was varied from 5 mg/ml to 10 mg/ml. The temperatures elevation varied from 4.2$^\circ$C (75 Oe and 355 kHz) to 21.5$^\circ$C (125 Oe and 355 kHz) and the specific loss powers varied from 2.8 W/g to 11.1 W/g for FeCoNi on GO at a concentration of 7 mg/ml.

New Phys.: Sae Mulli 2019; 69: 234-239

New Phys.: Sae Mulli 2019; 69: 221~337

Research Papers

Crystallographic and Magnetic Structures of Fe₇Se₈

Eng Chan KIM*

New Phys.: Sae Mulli 2019; 69: 221-226 https://doi.org/10.3938/NPSM.69.221