Magnetization and photomagnetic effects in diluted magnetic microcrystalline Cd1-xMnxTe |
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| Affiliation: | 1. SpinTec Laboratory, Department of Physics, Central University of South Bihar, Gaya 824236, Bihar, India;2. Department of Chemistry, Central University of South Bihar, Gaya 824236, Bihar, India;3. Department of Metallurgical and Materials Engineering, NIT, Rourkela 769008, India;4. Department of Physics, VIT-AP University, Beside AP Secretariat, Near Vijayawada, Amaravati 522237, Andhra Pradesh, India;5. Department of Physics and Astronomy, National Institute of Technology, Rourkela 769008, India;6. Centre for Materials Characterization & Testing, School of Mechanical Engineering, VIT, Vellore 632014, India;7. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452017, India;8. Department of Physics, Ranchi University, Ranchi 834008, India;9. Department of Physics & Centre for Interdisciplinary Research, University of Petroleum and Energy Studies (UPES), Dehradun 248007, Uttarakhand, India;1. Department of Physics, Central University of South Bihar, Gaya, 824236, Bihar, India;2. Department of Physics, School of Advanced Sciences, VIT-AP University, Amaravati, 522237, A.P., India;3. Lincoln, NE 68588, USA;4. Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A⁎STAR), 138634, Singapore;5. Photon Factory, IMSS, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan;1. Department of Physics, Central University of South Bihar, Gaya, 824236, Bihar, India;2. Department of Physics, Jamia Millia Islamia (Central University), New Delhi, 110025, India;3. Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo, 113-0033, Japan;4. Department of Physics, Madanapalle Institute of Technology & Science, Madanapalle, Chittoor, A.P, 517325, India;5. Research Project Division, JASRI, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan;6. Department of Applied Physics, Tokyo University of Science, Shinjuku, Tokyo, 162-8601, Japan;7. Division of Electronics for Informatics, Hokkaido University, Sapporo, 060-0814, Japan;8. Photon Factory, IMSS, High Energy Accelerator Research Organization, Tsukuba, Ibaraki, 305-0801, Japan |
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| Abstract: | We have investigated the magnetic and photomagnetic properties of microcrystalline Cd1-xMnxTe prepared by rf sputtering. Magnetization measurements were carried out using an rf SQUID magnetometer in the temperature range of 1.8 to 300 K at various magnetic fields up to 5.5 T. For temperatures above 40 K, the sample showed Curie-Weiss behaviour with a Curie temperature indicating predominantly antiferromagnetic interactions. A spin-glass phase transition was also observed. Photomagnetization measurements were performed using a fibre-optic system. The light was shone onto the sample utilizing an optical fibre and the subsequent change in the magnetization was sensed by the SQUID. Photo-induced magnetization was observed when the sample was illuminated by unpolarized light. Our results enable qualitative and quantitative conclusions to be drawn on the magnetic behaviour and the interplay between optical and magnetic properties of the diluted magnetic microcrystalline semiconductors.PACS: 68.55.Gi; 75.50.Pp. |
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