1-20 of 33
Kensuke Kobayashi
Close
Save search
Follow your search
Access your saved searches in your account
Close Modal
Sort by
Journal Articles

Frequency-tunable magnetic field sensing using continuous-wave optically detected magnetic resonance with nitrogen-vacancy centers in diamond

Ryusei Okaniwa, Takumi Mikawa, Yuichiro Matsuzaki, Tatsuma Yamaguchi, Rui Suzuki, Norio Tokuda, Hideyuki Watanabe, Norikazu Mizuochi, Kento Sasaki, Kensuke Kobayashi, Junko Ishi-Hayase
Journal: Journal of Applied Physics
J. Appl. Phys. 135, 044401 (2024)
https://doi.org/10.1063/5.0184629
Published: January 2024
View article titled, Frequency-tunable magnetic field sensing using continuous-wave optically detected magnetic resonance with nitrogen-vacancy centers in diamond
Open the PDF for Frequency-tunable magnetic field sensing using continuous-wave optically detected magnetic resonance with nitrogen-vacancy centers in diamond in another window
Journal Articles

Demonstration of highly sensitive wideband microwave sensing using ensemble nitrogen-vacancy centers

Editor’s Pick
Kensuke Ogawa, Shunsuke Nishimura, Kento Sasaki, Kensuke Kobayashi
Journal: Applied Physics Letters
Appl. Phys. Lett. 123, 214002 (2023)
https://doi.org/10.1063/5.0175456
Published: November 2023
View article titled, Demonstration of highly sensitive wideband microwave sensing using ensemble nitrogen-vacancy centers
Open the PDF for Demonstration of highly sensitive wideband microwave sensing using ensemble nitrogen-vacancy centers in another window
Includes: Supplementary data
Journal Articles

Wide-field quantitative magnetic imaging of superconducting vortices using perfectly aligned quantum sensors

Shunsuke Nishimura, Taku Kobayashi, Daichi Sasaki, Takeyuki Tsuji, Takayuki Iwasaki, Mutsuko Hatano, Kento Sasaki, Kensuke Kobayashi
Journal: Applied Physics Letters
Appl. Phys. Lett. 123, 112603 (2023)
https://doi.org/10.1063/5.0169521
Published: September 2023
View article titled, Wide-field quantitative magnetic imaging of superconducting vortices using perfectly aligned quantum sensors
Open the PDF for Wide-field quantitative magnetic imaging of superconducting vortices using perfectly aligned quantum sensors in another window
Includes: Supplementary data
Journal Articles

Magnetic field imaging by hBN quantum sensor nanoarray

Kento Sasaki, Yuki Nakamura, Hao Gu, Moeta Tsukamoto, Shu Nakaharai, Takuya Iwasaki, Kenji Watanabe, Takashi Taniguchi, Shinichi Ogawa, Yukinori Morita, Kensuke Kobayashi
Journal: Applied Physics Letters
Appl. Phys. Lett. 122, 244003 (2023)
https://doi.org/10.1063/5.0147072
Published: June 2023
View article titled, Magnetic field imaging by hBN quantum sensor nanoarray
Open the PDF for Magnetic field imaging by hBN quantum sensor nanoarray in another window
Journal Articles

Optimization of optical spin readout of the nitrogen-vacancy center in diamond based on spin relaxation model

Yuki Nakamura, Hideyuki Watanabe, Hitoshi Sumiya, Kohei M. Itoh, Kento Sasaki, Junko Ishi-Hayase, Kensuke Kobayashi
Journal: AIP Advances
AIP Advances 12, 055215 (2022)
https://doi.org/10.1063/5.0090450
Published: May 2022
View article titled, Optimization of optical spin readout of the nitrogen-vacancy center in diamond based on spin relaxation model
Open the PDF for Optimization of optical spin readout of the nitrogen-vacancy center in diamond based on spin relaxation model in another window
Journal Articles

Vector magnetometry using perfectly aligned nitrogen-vacancy center ensemble in diamond

Moeta Tsukamoto, Kensuke Ogawa, Hayato Ozawa, Takayuki Iwasaki, Mutsuko Hatano, Kento Sasaki, Kensuke Kobayashi
Journal: Applied Physics Letters
Appl. Phys. Lett. 118, 264002 (2021)
https://doi.org/10.1063/5.0054809
Published: June 2021
View article titled, Vector magnetometry using perfectly aligned nitrogen-vacancy center ensemble in diamond
Open the PDF for Vector magnetometry using perfectly aligned nitrogen-vacancy center ensemble in diamond in another window
Includes: Supplementary data
Journal Articles

Cryogenic GaAs high-electron-mobility-transistor amplifier for current noise measurements

Sanghyun Lee, Masayuki Hashisaka, Takafumi Akiho, Kensuke Kobayashi, Koji Muraki
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 023910 (2021)
https://doi.org/10.1063/5.0036419
Published: February 2021
View article titled, Cryogenic GaAs high-electron-mobility-transistor amplifier for current noise measurements
Open the PDF for Cryogenic GaAs high-electron-mobility-transistor amplifier for current noise measurements in another window
Journal Articles

Butterfly-shaped magnetoresistance in van der Waals ferromagnet Fe5GeTe2

Featured
Tomoharu Ohta, Masashi Tokuda, Shuichi Iwakiri, Kosuke Sakai, Benjamin Driesen, Yoshinori Okada, Kensuke Kobayashi, Yasuhiro Niimi
Journal: AIP Advances
AIP Advances 11, 025014 (2021)
https://doi.org/10.1063/9.0000067
Published: February 2021
View article titled, Butterfly-shaped magnetoresistance in van der Waals ferromagnet Fe<sub>5</sub>GeTe<sub>2</sub>
Open the PDF for Butterfly-shaped magnetoresistance in van der Waals ferromagnet Fe<sub>5</sub>GeTe<sub>2</sub> in another window
Journal Articles

Shubnikov-de-Haas oscillation and possible modification of effective mass in CeTe3 thin films

Mori Watanabe, Ryoya Nakamura, Sanghyun Lee, Takuya Asano, Takashi Ibe, Masashi Tokuda, Hiroki Taniguchi, Daichi Ueta, Yoshinori Okada, Kensuke Kobayashi, Yasuhiro Niimi
Journal: AIP Advances
Series: Magnetism and Magnetic Materials
AIP Advances 11, 015005 (2021)
https://doi.org/10.1063/9.0000074
Published: January 2021
View article titled, Shubnikov-de-Haas oscillation and possible modification of effective mass in CeTe<sub>3</sub> thin films
Open the PDF for Shubnikov-de-Haas oscillation and possible modification of effective mass in CeTe<sub>3</sub> thin films in another window
Journal Articles

Quantum oscillations with magnetic hysteresis observed in CeTe3 thin films

Mori Watanabe, Sanghyun Lee, Takuya Asano, Takashi Ibe, Masashi Tokuda, Hiroki Taniguchi, Daichi Ueta, Yoshinori Okada, Kensuke Kobayashi, Yasuhiro Niimi
Journal: Applied Physics Letters
Appl. Phys. Lett. 117, 072403 (2020)
https://doi.org/10.1063/5.0007517
Published: August 2020
View article titled, Quantum oscillations with magnetic hysteresis observed in CeTe<sub>3</sub> thin films
Open the PDF for Quantum oscillations with magnetic hysteresis observed in CeTe<sub>3</sub> thin films in another window
Journal Articles

Etching process of narrow wire and application to tunable-barrier electron pump

Shota Norimoto, Shuichi Iwakiri, Masahiko Yokoi, Tomonori Arakawa, Yasuhiro Niimi, Kensuke Kobayashi
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 91, 085110 (2020)
https://doi.org/10.1063/5.0011767
Published: August 2020
View article titled, Etching process of narrow wire and application to tunable-barrier electron pump
Open the PDF for Etching process of narrow wire and application to tunable-barrier electron pump in another window
Includes: Supplementary data
Journal Articles

Multiple modes of a single spin torque oscillator under the non-linear region

Satoshi Sugimoto, Shuichi Iwakiri, Yusuke Kozuka, Yukiko Takahashi, Yasuhiro Niimi, Kensuke Kobayashi, Shinya Kasai
Journal: AIP Advances
AIP Advances 10, 075115 (2020)
https://doi.org/10.1063/5.0013105
Published: July 2020
View article titled, Multiple modes of a single spin torque oscillator under the non-linear region
Open the PDF for Multiple modes of a single spin torque oscillator under the non-linear region in another window
Journal Articles

Generation of multipeak spectrum of spin torque oscillator in non-linear regime

Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Kensuke Kobayashi, Yusuke Kozuka, Yukiko K. Takahashi, Shinya Kasai
Journal: Applied Physics Letters
Appl. Phys. Lett. 117, 022406 (2020)
https://doi.org/10.1063/5.0013102
Published: July 2020
View article titled, Generation of multipeak spectrum of spin torque oscillator in non-linear regime
Open the PDF for Generation of multipeak spectrum of spin torque oscillator in non-linear regime in another window
Journal Articles

Observation of the magnetization metastable state in a perpendicularly magnetized nanopillar with asymmetric potential landscape

Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Kensuke Kobayashi, Yukiko K. Takahashi, Shinya Kasai
Journal: Applied Physics Letters
Appl. Phys. Lett. 115, 092407 (2019)
https://doi.org/10.1063/1.5098866
Published: August 2019
View article titled, Observation of the magnetization metastable state in a perpendicularly magnetized nanopillar with asymmetric potential landscape
Open the PDF for Observation of the magnetization metastable state in a perpendicularly magnetized nanopillar with asymmetric potential landscape in another window
Journal Articles

Fabrication of thin films of two-dimensional triangular antiferromagnet Ag2CrO2 and their transport properties

Hiroki Taniguchi, Shota Suzuki, Tomonori Arakawa, Hiroyuki Yoshida, Yasuhiro Niimi, Kensuke Kobayashi
Journal: AIP Advances
AIP Advances 8, 025010 (2018)
https://doi.org/10.1063/1.5016428
Published: February 2018
View article titled, Fabrication of thin films of two-dimensional triangular antiferromagnet Ag<sub>2</sub>CrO<sub>2</sub> and their transport properties
Open the PDF for Fabrication of thin films of two-dimensional triangular antiferromagnet Ag<sub>2</sub>CrO<sub>2</sub> and their transport properties in another window
Journal Articles

Anomalous behavior of 1/f noise in graphene near the charge neutrality point

Shunpei Takeshita, Sadashige Matsuo, Takahiro Tanaka, Shu Nakaharai, Kazuhito Tsukagoshi, Takahiro Moriyama, Teruo Ono, Tomonori Arakawa, Kensuke Kobayashi
Journal: Applied Physics Letters
Appl. Phys. Lett. 108, 103106 (2016)
https://doi.org/10.1063/1.4943642
Published: March 2016
View article titled, Anomalous behavior of 1/<em>f</em> noise in graphene near the charge neutrality point
Open the PDF for Anomalous behavior of 1/<em>f</em> noise in graphene near the charge neutrality point in another window
Journal Articles

Leak current estimated from the shot noise in magnetic tunneling junctions

Takahiro Tanaka, Tomonori Arakawa, Masahiro Maeda, Kensuke Kobayashi, Yoshitaka Nishihara, Teruo Ono, Takayuki Nozaki, Akio Fukushima, Shinji Yuasa
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 042405 (2014)
https://doi.org/10.1063/1.4891556
Published: July 2014
View article titled, Leak current estimated from the shot noise in magnetic tunneling junctions
Open the PDF for Leak current estimated from the shot noise in magnetic tunneling junctions in another window
Journal Articles

Conductance fluctuation and weak antilocalization in epitaxial Bi 2 Se 3

Sadashige Matsuo, Tomohiro Koyama, Kazutoshi Shimamura, Tomonori Arakawa, Yoshitaka Nishihara, Daichi Chiba, Kensuke Kobayashi, Teruo Ono, Cui-Zu Chang, Ke He, Xu-Cun Ma, Qi-Kun Xue
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1566, 193–194 (2013)
https://doi.org/10.1063/1.4848351
Published: December 2013
View article titled, Conductance fluctuation and weak antilocalization in epitaxial Bi 2 Se 3
Open the PDF for Conductance fluctuation and weak antilocalization in epitaxial Bi 2 Se 3 in another window
Journal Articles

Shot noise at the quantum point contact in InGaAs heterostructure

Yoshitaka Nishihara, Shuji Nakamura, Kensuke Kobayashi, Teruo Ono, Makoto Kohda, Junsaku Nitta
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1566, 311–312 (2013)
https://doi.org/10.1063/1.4848410
Published: December 2013
View article titled, Shot noise at the quantum point contact in InGaAs heterostructure
Open the PDF for Shot noise at the quantum point contact in InGaAs heterostructure in another window
Journal Articles

Cryogenic amplifier for shot noise measurement at 20 mK

Tomonori Arakawa, Yoshitaka Nishihara, Masahiro Maeda, Shota Norimoto, Kensuke Kobayashi
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 172104 (2013)
https://doi.org/10.1063/1.4826681
Published: October 2013
View article titled, Cryogenic amplifier for shot noise measurement at 20 mK
Open the PDF for Cryogenic amplifier for shot noise measurement at 20 mK in another window