Dielectric relaxation and magnetic field dependent alternating current conductivity of nanocrystalline cadmium–zinc ferrite below room temperature

2011 ◽  
Vol 406 (17) ◽  
pp. 3261-3266 ◽  
Author(s):  
S. Ghatak ◽  
G. Chakraborty ◽  
M. Sinha ◽  
S.K. Pradhan ◽  
A.K. Meikap
Keyword(s):  
Magnetic Field ◽  
Dielectric Relaxation ◽  
Zinc Ferrite ◽  
Room Temperature ◽  
Alternating Current ◽  
Field Dependent ◽  
Cadmium Zinc

scholarly journals Enhanced Cancer Cell (HeLa) Killing Efficacy of Mixed Αlpha and Gamma Iron Oxide Superparamagnetic Nanoparticles under Combined AC (Alternating Current) Magnetic-Field and Photoexcitation

1970 ◽  
Vol 12 (4) ◽  
Author(s):  
Md. Shariful Islam, Yoshihumi Kusumoto, Md. Abdulla Al-Mamun And Yuji Horie
Keyword(s):  
Magnetic Field ◽  
Iron Oxide ◽  
Hela Cells ◽  
Room Temperature ◽  
Heat Dissipation ◽  
Alternating Current ◽  
Superparamagnetic Nanoparticles ◽  
Gamma Iron ◽  
Ac Magnetic Field ◽  
Current Magnetic Field

We synthesized mixed α and γ-Fe2O3 nanoparticles and investigated their toxic effects against HeLa cells under induced AC (alternating current) magnetic-fields and photoexcited conditions at room temperature. The findings revealed that the cell-killing percentage was increased with increasing dose for all types of treatments. Finally, 99% cancer cells were destructed at 1.2 mL dose when exposed to combined AC magnetic-field and photoexcited conditions (T3) whereas 89 and 83 % of HeLa cells were killed under only AC magnetic-field induced (T1) or only photoexcited (T2) condition at the same dose.ABSTRAK: Campuran α dan zarah γ-Fe2O3 bersaiz nano disintesiskan dan kesan toksidnya terhadap sel HeLa dikaji dibawah aruhan medan magnet arus ulang-alik (alternating current (AC)) dan keadaan photoexcited (proses ransangan atom atau molekul suatu bahan dengan penyerapan tenaga sinaran) pada suhu bilik. Penemuan mendedahkan bahawa peratusan sel yang musnah bertambah dengan pertambahan dos untuk semua jenis rawatan. Akhirnya, 99% sel kanser dimusnahkan pada kadar dos 1.2mL setelah didedahkan terhadap kombinasi medan magnet AC dan keadaan photoexcited (T3) dimana 89% dan 83% sel HeLa dimusnahkan dengan hanya di bawah aruhan medan magnet AC (T1) atau hanya pada keadaan photoexcited (T2) pada kadar dos yang sama.KEY WORDS : Cancer, Hyperthermia, Iron oxide nanoparticles, Heat dissipation,    Cytotoxicity, HeLa cell.

ROOM TEMPERATURE MAGNETIC ANOMALIES IN BENZENE TREATED Bi–Pb–Sr–Ca–Cu–O POWDER

1991 ◽  
Vol 05 (21) ◽  
pp. 1447-1456 ◽  
Author(s):  
A. R. HARUTUNYAN ◽  
L. S. GRIGORYAN ◽  
A. S. KUZANYAN ◽  
A. A. KUZNETSOV ◽  
A. A. TERENTIEV ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Chemical Composition ◽  
Room Temperature ◽  
Microprobe Analysis ◽  
Magnetic Anomalies ◽  
X Ray Diffraction ◽  
X Ray ◽  
Two Samples ◽  
Field Dependent ◽  
History Of

Two samples of benzene-treated Bi–Pb–Sr–Ca–Cu–O powder exhibited at 300 K magnetic field dependent diamagnetism and magnetization irreversibility. The treatment with benzene resulted also in the appearance of microwave absorption at low magnetic fields, while is sensitive to magnetic history of the sample. From X-ray diffraction data one can see that upon benzene treatment the reflections of 85 K and 110 K phases do not change practically, but a series of new reflections appeared, indicating a lattice modulation with 4.9 nm periodicity. A microprobe analysis revealed substantial inhomogeneity of chemical composition across the samples. The room temperature anomalies were weakened in one sample and vanished in the second upon thermal cycling.

scholarly journals Direct and Alternate Current Conductivity and Magnetoconductivity of Nanocrystalline Cadmium-Zinc Ferrite below Room Temperature

2011 ◽  
Vol 02 (04) ◽  
pp. 226-236 ◽  
Author(s):  
Somenath Ghatak ◽  
Goutam Chakraborty ◽  
Monika Sinha ◽  
Swapan Kumar Pradhan ◽  
Ajit Kumar Meikap
Keyword(s):  
Zinc Ferrite ◽  
Room Temperature ◽  
Alternate Current ◽  
Cadmium Zinc

scholarly journals Evidence for Stable High-Temperature Ferromagnetism in Fluorine-Treated C60

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Rajen Patel ◽  
Frank J. Owens
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Magnetic Force Microscopy ◽  
Room Temperature ◽  
Magnetic Force ◽  
Ac Susceptibility ◽  
Ferromagnetic Material ◽  
Molecular Orbital Calculations ◽  
Force Microscopy ◽  
Field Dependent

It is shown by magnetic field dependent ac susceptibility, magnetic force microscopy, and ferromagnetic resonance that exposure of C60 to fluorine at 160°C produces a stable ferromagnetic material with a Curie temperature well above room temperature. The exposure to fluorine is accomplished by decomposing a fluorine-rich polymer, trifluorochloroethylene [F2C–CFCl]n, which has C60 imbedded in it. Based on previous experimental observations and molecular orbital calculations, it is suggested that the ferromagnetism is arising from crystals of C60–F.

scholarly journals Magnetic-field-dependent quantum emission in hexagonal boron nitride at room temperature

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Annemarie L. Exarhos ◽  
David A. Hopper ◽  
Raj N. Patel ◽  
Marcus W. Doherty ◽  
Lee C. Bassett
Keyword(s):  
Magnetic Field ◽  
Boron Nitride ◽  
Room Temperature ◽  
Hexagonal Boron Nitride ◽  
Field Dependent

Superior room-temperature magnetic field-dependent magnetoelectric effect in BiFeO3-based multiferroic

2018 ◽  
Vol 762 ◽  
pp. 184-189 ◽  
Author(s):  
Linlin Pan ◽  
Qiao Yuan ◽  
Zuzhen Liao ◽  
Lili Qin ◽  
Jian Bi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Room Temperature ◽  
Magnetoelectric Effect ◽  
Field Dependent

Magnetic Field Dependent Dielectric Properties in Ba(Ti0.99-xMn0.01Tax)O3 Ceramics

2015 ◽  
Vol 804 ◽  
pp. 71-74
Author(s):  
Thanapong Sareein ◽  
Athipong Ngamjarurojana ◽  
Rattikorn Yimnirun
Keyword(s):  
Magnetic Field ◽  
Dielectric Properties ◽  
Electric Field ◽  
Applied Magnetic Field ◽  
Mixed Oxide ◽  
Room Temperature ◽  
Domain Switching ◽  
Ferroelectric Ceramics ◽  
Field Dependent ◽  
The Magnetic Field

Hybrid-doped BaTiO3 ferroelectric ceramics Ba (Ti(0.99-x)Mn0.01Tax)O3 systems have been prepared by a conventional mixed-oxide method viavibro-milling technique. The dielectric properties at room temperature were observed under magnetic field applied parallel to electric field. The results indicate significant changes of both properties with the magnetic field. Moreover, explained in terms of the induction of magnetization by means of an electric field and induction of polarization according to domain switching of the dielectric properties under the influence of the applied magnetic field.

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