Low temperature pressure dependence of the muon hyperfine fields in iron,cobalt and nickel |
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| Institution: | 1. Department of Chemistry and Research Center for Smart Molecules, Faculty of Science, Rikkyo University, 3-34-1 Nishi-ikebukuro, Toshima-ku, Tokyo 171-8501, Japan;2. Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan;3. School of Pharmacy and Pharmaceutical Sciences, Hoshi University, 2-4-41 Ebara, Shinagawa-Ku, Tokyo 142-8501, Japan;4. Biomedical Research Institute, AIST, Tsukuba Central 2, Tsukuba, Ibaraki 305-8568, Japan;1. High Energy Accelerator Research Organization (KEK), Oho 1-1, Tsukuba 305–0801, Japan;2. Center of Technology Innovation-Energy, Hitachi, Ltd., Hitachi 319-1221, Japan;1. Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al Kharj, Saudi Arabia;2. Department of Organic Chemistry, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt;3. Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;4. Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;5. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Azhar University, Cairo, Egypt;6. NEUROFARBA Department, Section of Pharmaceutical and Nutraceutical Sciences, University of Florence, Via U. Schiff 6, 50019 Sesto, Fiorentino, Firenze, Italy;1. Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia;2. Department of Physics, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia;3. The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, Miramare-Trieste, Italy;4. Mathematics and Statistics Department, Faculty of Science, Taif University, Taif, Saudi Arabia;5. Mathematics Department, Faculty of Science, Sohag University, Sohag, Egypt;1. Department of Medical Engineering, Afeka Tel Aviv Academic College of Engineering, Tel Aviv, Israel;2. Department of Exact Sciences, Afeka Tel Aviv Academic College of Engineering, Tel Aviv, Israel;3. Neufeld Cardiac Research Institute, Tel Aviv University, Sheba Medical Center, Tel-Hashomer, Israel |
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| Abstract: | The pressure dependence of the μ+ local magnetic fields in polycrystalline Fe and Ni and a Co single crystal has been measured at 77 K, up to 0.7 GPa, using a He gas high pressure setup. The pressure derivatives dlnBμ/dP in units of mT/GPa are +4.4±1.0 (Fe), -0.7±1.1 (Co) and +0.63±0.10 (Ni). From these values the hyperfine field volume derivatives are deduced. Using these values together with previously determined room temperature derivatives the thermal expansion part of the temperature dependence of the hyperfine field can be calculated. The remaining explicit temperature dependence below 300 K, which deviates markedly from the temperature dependence of the bulk magnetization, is discussed. |
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