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Magnetic properties of a charged spin-1 Bose gas with ferromagnetic interactions is investigated within mean-field theory. It is shown that a competition between paramagnetism, diamagnetism and ferromagnetism exists in this system. It is…

Statistical Mechanics · Physics 2015-06-11 Jihong Qin , Xiaoling Jian , Qiang Gu

We investigate the magnetic properties of spin-$1/2$ charged Fermi gases with ferromagnetic coupling via mean-field theory, and find the interplay among the paramagnetism, diamagnetism and ferromagnetism. Paramagnetism and diamagnetism…

Statistical Mechanics · Physics 2016-01-15 Baobao Wang , Jihong Qin , Huaiming Guo

The appearance of magnetization during the application of mechanical stress and the creation of elastic deformation during the application of a magnetic field are two fundamental properties of piezomagnetic materials. The symmetry of…

Superconductivity · Physics 2021-06-16 V. P. Mineev

Ferrites, magnetic materials primarily composed of iron oxides, exhibit diverse magnetic behaviors, including diamagnetism, paramagnetism, ferromagnetism, antiferromagnetism, ferrimagnetism, and superparamagnetism. This paper explores the…

Materials Science · Physics 2024-06-18 Maryam M. Ahmed , Nagwa Abu-Elsaad

We have identified ferromagnetic- and superconducting-like magnetization hysteresis loops in highly oriented pyrolytic graphite samples below and above room temperature. We also found that both behaviors are very sensitive to…

Strongly Correlated Electrons · Physics 2007-05-23 Y. Kopelevich , P. Esquinazi , J. H. S. Torres , S. Moehlecke

Ferromagnetism is observed below 10 K in [Bi0.75Te0.125Mn0.125]Te. This material has the BiTe structure, which is made from the stacking of two Te-Bi-Te-Bi-Te blocks and one Bi-Bi block per unit cell. Crystal structure analysis shows that…

Materials Science · Physics 2009-11-11 J. W. G. Bos , M. Lee , E. Morosan , H. W. Zandbergen , W. L. Lee , N. P. Ong , R. J. Cava

Domain wall motion in magnetic materiel induces the negative susceptibility leading to a perfect diamagnetism state. The local susceptibility is calculated by the derivative of magnetization ($\vec{M}$) vector w.r.t. magnetic field strength…

Applied Physics · Physics 2022-03-16 Nilesh Pandey , Yogesh Singh Chauhan

Low-temperature properties of a crystal containing superconducting inclusions of two different materials have been studied. In the approximation that the size of inclusions is much smaller than the coherence length/penetration depth of the…

Superconductivity · Physics 2014-05-22 Oksana N. Shevtsova

Ferromagnetic behaviour has been observed experimentally for the first time in nanostructured Manganese. Ultrathin ($\sim$ 0.6 nm) Manganese nanosheets have been synthesized inside the two dimensional channels of sol-gel derived Na-4 mica.…

Mesoscale and Nanoscale Physics · Physics 2012-05-08 Sreemanta Mitra , Amrita Mandal , Anindya Datta , Sourish Banerjee , Dipankar Chkaravorty

The epoxy/magnetite nanocomposites express superparamagnetism under a static or low-frequency electromagnetic field. At the microwave frequency, said the X-band, the nanocomposites reveal an unexpected diamagnetism. To explain the…

Mesoscale and Nanoscale Physics · Physics 2021-01-18 Che-Hao Chang , Shih-Chieh Su , Tsun-Hsu Chang , Ching-Ray Chang

We have studied magnetization of graphene nanocrystals obtained by sonic exfoliation of graphite. No ferromagnetism is detected at any temperature down to 2 K. Neither do we find strong paramagnetism expected due to the massive amount of…

Mesoscale and Nanoscale Physics · Physics 2010-11-24 M. Sepioni , R. R. Nair , S. Rablen , J. Narayanan , F. Tuna , R. Winpenny , A. K. Geim , I. V. Grigorieva

Microcrystals of orthorhombic nickel (II) oxalate dihydrate were synthesized through a precipitation reaction of aqueous solutions of nickel chloride and oxalic acid. Magnetic susceptibility exhibits a sharp peak at 3.3 K and a broadrounded…

Materials Science · Physics 2012-04-16 E Romero , ME Mendoza , R Escudero

The present article concludes that a ferromagnetic sample could be considered like a paramagnetic system where the role of magnetic moments plays magnetic domains. Based on this conclusion and taking into account presence of an anisotropic…

Materials Science · Physics 2016-07-18 R. Khachaturyan , V. Mekhitarian

Paramagnetic Meissner effect was observed in single crystal Yb(3)Rh(4)Sn(13). While field cooling the sample, at the onset of the superconducting transition at 7.92 K, the DC magnetization first goes through a minimum at 7.85 K, followed by…

Superconductivity · Physics 2014-08-12 P. Kulkarni

The existence of high-temperature ferromagnetism in thin films and nanoparticles of oxides containing small quantities of magnetic dopants remains controversial. Some regard these materials as dilute magnetic semiconductors, while others…

Materials Science · Physics 2015-05-18 J. M. D. Coey , P. Stamenov , R. D. Gunning , M. Venkatesan , K. Paul

We have reinvestigated the magnetic properties of the classical metallic helimagnet MnP by magnetization and neutron scattering experiments. Our neutron scattering results indicate that the previously reported magnetic structure in the…

Room-temperature ferromagnetism has been observed in the nanoparticles (7 - 30 nm dia) of nonmagnetic oxides such as CeO2, Al2O3, ZnO, In2O3 and SnO2. The saturated magnetic moments in CeO_2 and Al_2O_3 nanoparticles are comparable to those…

Materials Science · Physics 2007-07-24 A. Sundaresan , R. Bhargavi , N. Rangarajan , U. Siddesh , C. N. R. Rao

Antiferromagnetic materials are magnetic inside, however, the direction of their ordered microscopic moments alternates between individual atomic sites. The resulting zero net magnetic moment makes magnetism in antiferromagnets invisible on…

Materials Science · Physics 2016-03-23 T. Jungwirth , X. Marti , P. Wadley , J. Wunderlich

Investigations of the magnetic properties of graphenes prepared by different methods reveal that dominant ferromagnetic interactions coexist along with antiferromagnetic interactions in all the samples. Thus, all the graphene samples…

Chemical Physics · Physics 2009-04-20 H. S. S. Ramakrishna Matte , K. S. Subrahmanyam , C. N. R. Rao

The experimentally observed ferromagnetism in MgB2 in the normal state is attributed to micro phase separated inclusions of iron. This magnetic character is also observed when the iron content of the samples is reduced below 20 micro-g/g,…

Superconductivity · Physics 2007-05-23 S. Reich , G. Leitus , I. Felner
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