Low temperature static magnetization of an organic ferromagnet, β-p-NPNN |
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| Institution: | 1. Condensed Matter Physics Group, Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology, Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan;2. Condensed Molecular Materials Laboratory, RIKEN, Wako, Saitama 351-0198, Japan;1. Departamento de Química, Universidad de Guanajuato, Noria Alta s/n, 36050 Guanajuato, Gto., Mexico;2. Instituto de Ciencia y Tecnología de Polímeros (CSIC), Juan de la Cierva No. 3, 28006 Madrid, Spain;3. Universitá degli Studi di Perugia, Gruppo STM, 05100 Terni, Italy;1. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA;2. Department of Materials Science and Engineering, University of Maryland, College Park, MD, 20742, USA;3. Department of Chemistry, Indian Institute of Technology Delhi, 110016, India;4. Institute of Nano Science and Technology, Mohali, 160064, India;1. Mechanical Engineering Department, Faculty of Technology, Dharmsinh Desai University, Nadiad-387001, Gujarat, India;2. Mechanical Engineering Department, Sardar Vallabhbhai National Institute of Technology, Surat-395007, Gujarat, India;3. Mathematics Department, Sardar Patel University, Vallabh Vidhynagar, Anand-388120, Gujarat, India;4. Mathematics Department, L. D. College of Engineering, Opp. Gujarat University, Ahmedabad, Gujarat, India;1. EPR Spectroscopy Section, CSIR-National Physical Laboratory, Dr. K.S. Krishnan Marg, New Delhi 110012, India;2. School of Applied Sciences, Netaji Subhas Institute of Technology, University of Delhi, Sector 3, Dwarka, New Delhi 110078, India;7. Mathematics and its Applications in Life Sciences Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam;8. Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam;1. Institut de Ciencies del Cosmos (ICCUB), Universitat de Barcelona, Mart Franqus 1, E08028 Barcelona, Spain;2. Institute for Theoretical Physics, Spinoza Institute and EMMEΦ, Utrecht University, Postbox 80.195, 3508 TD Utrecht, The Netherlands |
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| Abstract: | A 3He refrigerator mountable to a commercial SQUID magnetometer has been developed, which enables us to measure static magnetizations of a sample at temperatures below 2 K conveniently. The design and usage of the system are outlined. We have applied this to study static magnetic properties of an organic ferromagnet, β-p-NPNN, and have confirmed that the saturation magnetization is 1 μB per molecule. No hysteretic behavior has been detected, when the field was applied along the easy axis. This indicates that β-p-NPNN is a very soft magnet, as expected for an isotropic Heisenberg magnet based on organic radicals. |
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