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College of Science and Engineering
Department of Physics

Project Page Binod D.C.

Binod DC: Magnetic Characterization.
PyO

Magnetic Characterization: Magnetic properties of NiFeO and NiFe thin films.

 

Yubo

Binod D.C..

 

Texas State University at San Marcos, Department of Physics, RFM 2225, 601 University Drive, San Marcos, TX78666.

 

Binod D.C.

  

 

Radio Frequency (RF) sputtered NiO thin films find application in various novel devices, including solar cells, batteries, computer memory, sensors, catalyzers, and gas sensors. The electric properties of NiO can be modified by changing the ratio of oxygen to metal atoms. In addition, it is possible to modify the materials crystallinity by doping it with other transition metals modifying grain size and defect density. Here, we discuss the magnetic properties of reactive RF sputtered NiO and Fe-doped NiO thin films sputtered at different O2 flow rates ranging from 0.8 to 10 sccm. NiO films sputtered with high O2 flows are highly conductive and transparent suggesting the presence of metal vacancies. Films deposited with an oxygen flow less than 1.25 sccm are not completely oxidized and have a large non-zero magnetization. The incomplete oxidation is confirmed by X-ray measurements which show the appearance of a metallic peak in the XRD data for lower O2 flow samples. XPS measurements performed to verify the metal to oxidation ratio of the samples will be discussed as well.

Publications:

[1] Binod D.C., Andres Oliva, Anival Ayala, Shankar Acharya, Fidele Twagirayezu, James Nick Talbert, Luisa M. Scolfaro, Wilhelmus J. Geerts, “Magnetic Properties of reactive co-sputtered NiFe-oxide samples”, August 13, 2018, 6 page paper published in IEEE Trans. on Magn., DOI: 10.1109/TMAG.2018.2866788
[2] Kolton Dieckow, Binod D.C., Chandan Howlader, Erik Samwel, Wilhelmus J. Geerts, "A new method to allign the sample in a VSM furbished with a modified Mallinson coil set using circular trajectories", under preparation.
[3] Tanjina Nasreen Ahmed, Kolton Dieckow, Binod D.C., Wilhelmus Geerts, Erik Samwel, "Correction strategy for systematic wobble errors in VSM Torque Curves measured on soft magnetic samples", under preparation.
[4] Arjun Sapkota, Leo Rodriguez, Binod D.C, Kolton Dieckow, Chandan Howlader, Jitendra Tate, Wilhelmus Geerts, "On the origin of systematic errors in VSM Torque Curves", AIP Advances 14, 1, 015048, 2024, On the origin of systematic errors in VSM torque curves | AIP Advances | AIP Publishing (impact factor 1.697).

Presentations/Posters:

[2] Binod D.C., Andres Oliva, Anival Ayala, Shankar Acharya, Fidele Twagirayezu, James Nick Talbert, Luisa Scolfaro, Wilhelmus Geerts, “Magnetic Properties of reactive sputtered NiFe-oxide samples”, International Conference on Magnetism 2018, July 18, San Francisco.
[3] D. C. Binod, Andres Oliva, Anival Ayala, Shankar Acharya, Fidele Twagirayezu, James Talbert, Luisa Scolfaro, Wilhelmus Geerts, “VSM measurements on NiFe-oxide samples”, poster presentation at the Spring-2018 TSAPS meeting at Tarleton State University in Stephenville, march 23, 2018.
[4] Selena Rose Najar, Joselyn Lesikar, Binod D.C., Luisa Scolfaro, Wilhelmus J. Geerts, “Temperature Dependence of the Magnetic Properties of Reactive RF Sputtered NiFeO Thin Films”, Fall-2018 TSAPS presentation, October 15, Houston.
[5] Selena Rose Najar, Joselyn Lesikar, Binod D.C., Luisa Scolfaro, Wilhelmus Geerts, “Preliminary Temperature Dependence of the Magnetic Properties of Reactive RF Sputtered NiFeO Thin Films”, Symposium for Undergraduate Research Exploration 2018, University of Texas at Austin, October 4, 2018.
[6] Binod D.C., Wilhelmus J. Geerts, Aaron Medina, “Calculation of distribution of temperature and potential on RRAM using finite element method”, presentation at the Fall-2017 meeting of the TSAPS, Dallas, October 20-21 2017.
[7] Kolton Dieckow, Sarah Beth Ragan, Chandan Howlader, Binod D.C., Wilhelmus Geerts, Biaxial VSM Sensitivity and Crosstalk Measurement Dependence for Sxx(x,y,z), Sxy(x,y,z), and Sxz(x,y,z), poster presentation Fall-2019 meeting of the TSAPS, Lubbock, October 25-26, 2019.
[8] Arjun Sapkota, Leo Rodriguez, Binod D.C, Kolton Dieckow, Chandan Howlader, Jitendra Tate, Wilhelmus Geerts, "On the origin of systematic errors in VSM Torque Curves", poster presentation MMM-2023 conference, 10/30/2023-11/3/2023, Dallas.

Binod graduated in August 2019 and is currently enrolled in the MSEC PhD. program at Texas State University working on scanning probe microscopy.