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The magnetic behavior of the heavy fermion superconductor CeCoIn5 has been investigated. The low field magnetization data show flux jumps in the mixed state of the superconducting phase in a restricted range of temperature. These flux jumps…

Superconductivity · Physics 2009-11-10 S. Majumdar , M. R. Lees , G. Balakrishnan , D. McK Paul

Single crystals of the oxypnictide superconductor SmFeAsO_(0.8)F_(0.2) with T_c=45(1) K were investigated by torque magnetometry. The crystals of mass~0.1 mug were grown by a high-pressure cubic anvil technique. The use of a high-sensitive…

Superconductivity · Physics 2009-03-23 S. Weyeneth , R. Puzniak , U. Mosele , N. D. Zhigadlo , S. Katrych , Z. Bukowski , J. Karpinski , S. Kohout , J. Roos , H. Keller

Spinel chromites ACr$_2$O$_4$ with inherent magnetic geometrical frustration usually exhibit a noncollinear ferrimagnetic ground state when A are magnetic ions, with possibly crystallite-size dependent intriguing magnetic features. Here, we…

Materials Science · Physics 2023-05-30 Mohamed A. Kassem , Abdulaziz Abu El-Fadl , Ahmed M. Nashaat , Hiroyuki Nakamura

Magnetic field induced transitions in the antiferromagnetic layered manganite La1.4Sr1.6Mn2O7 were studied using magnetization measurements and a high-resolution magneto-optical imaging technique. We report the first direct observation of…

Condensed Matter · Physics 2009-10-31 U. Welp , A. Berger , D. J. Miller , V. K. Vlasko-Vlasov , K. E. Gray , J. F. Mitchell

The high-field magnetic properties and magnetic order of the gem mineral green dioptase Cu$_6[$Si$_6$O$_{18}]\cdot 6$H$_2$O have been studied by means of single-crystal neutron diffraction in magnetic fields up to $21~$T and magnetization…

A systematic study of thermomagnetic irreversibility CoS$_{1.76}$Se$_{0.24}$ has been carried out. Our study shows that the resistivity at low temperature can be tuned by cooling in different magnetic fields and the critical field required…

Strongly Correlated Electrons · Physics 2016-07-22 Saroj Kumar Mishra , R Rawat

We report the evolution of magnetic moment as well as magnetic anisotropy with crystalline order in Co$_2$MnSi thin films grown on $(100)$ MgO by pulsed laser deposition. The films become more ordered as the annealing temperature ($T_A$)…

Materials Science · Physics 2013-05-31 Himanshu Pandey , P. C. Joshi , R. P. Pant , R. Prasad , S. Auluck , R. C. Budhani

We performed high-field magnetotransport and magnetization measurements on a single crystal of the 122-phase iron pnictide Ba(Fe1-xCox)2As2. Unlike the HTS cuprates and 1111-phase oxypnictides, Ba(Fe1-xCox)2As2 showed practically no…

We present a study of the magnetic susceptibility of La_2-xSr_xCoO_4 single crystals in a doping range 0.3<=x<=0.8. Our data shows a pronounced magnetic anisotropy for all compounds. This anisotropy is in agreement with a low-spin ground…

Strongly Correlated Electrons · Physics 2008-05-27 N. Hollmann , M. W. Haverkort , M. Cwik , M. Benomar , M. Reuther , A. Tanaka , T. Lorenz

In the present investigation, some novel magnetic behaviors exhibited by double perovskite (DP) Eu2CoMnO6(ECMO) has been reported. XRD analysis of ECMO showed that it has a monoclinic crystal structure (space group P 21/n). A second-order…

Materials Science · Physics 2019-09-30 Mohd Alam , Arkadeb Pal , Khyati Anand , Prajyoti Singh , Sandip Chatterjee

Exploring the uncharacterized magnetic phases of Co$^{2+}$ chain compounds is critical for finding new low-dimensional magnets hosting quantized excitations. We map the unexplored magnetic phases of the Co$^{2+}$ chain compound…

Strongly Correlated Electrons · Physics 2023-10-18 Zachary W. Riedel , Zhihao Jiang , Maxim Avdeev , André Schleife , Daniel P. Shoemaker

The magnetization of amorphous DyCo3 and TbCo3 is studied by magnetometry, anomalous Hall effect and magneto-optic Kerr effect to understand the temperature-dependent magnetic structure. A square magnetic hysteresis loop with perpendicular…

Materials Science · Physics 2023-12-21 Zexiang Hu , Ajay Jha , Katarzyna Siewierska , Ross Smith , Karsten Rode , Plamen Stamenov , J. M. D. Coey

An antiferromagnetic transition is observed in single crystal EuRh2As2 at a high temperature T_N = 47 K compared to the ferromagnetic Weiss temperature theta = 12 K. We show that this is, surprisingly, consistent with mean field theory. A…

Strongly Correlated Electrons · Physics 2010-11-12 Yogesh Singh , Y. Lee , B. N. Harmon , D. C. Johnston

We have investigated the upper critical field anisotropy and magnetotransport properties of Fe1.14(1)Te0.91(2)S0.09(2) single crystals in stable magnetic fields up to 35 T. The results show that u0Hc2(T) along the c axis and in the ab-plane…

Superconductivity · Physics 2010-05-21 Hechang Lei , Rongwei Hu , E. S. Choi , J. B. Warren , C. Petrovic

Single crystals of HoIr$_2$Si$_2$ with the body-centered ThCr$_2$Si$_2$-type structure ($I4/mmm$) were grown by Bridgman method from indium flux. Single crystal structure determination yielded a Si-z position of 0.378(1) in the structure.…

Strongly Correlated Electrons · Physics 2018-07-11 Kristin Kliemt , Michael Bolte , Cornelius Krellner

The magnetic state of the single-component molecular compound, [Cu(tmdt)$_{2}$], is investigated by means of $^{1}$H-NMR. An abrupt spectral broadening below 13 K and a sharp peak in nuclear spin-lattice relaxation rate, $T_{1}^{-1}$, at 13…

Strongly Correlated Electrons · Physics 2012-05-31 Rina Takagi , Kazuya Miyagawa , Kazushi Kanoda , Biao Zhou , Akiko Kobayashi , Hayao Kobayashi

The anisotropic Kondo necklace model in 2D and 3D is treated as a genuine model for magnetic to Kondo singlet quantum phase transitions in the heavy fermion (HF) compounds. The variation of the quantum critical point (QCP) with anisotropy…

Strongly Correlated Electrons · Physics 2018-02-02 P. Thalmeier , A. Langari

Magnetoresistance loops under in-plane applied field were measured on perpendicularly magnetized magnetic tunnel junction (pMTJ) pillars with nominal diameters ranging from 50 to 150 nm. By fitting the hard-axis magnetoresistance loops to…

Mesoscale and Nanoscale Physics · Physics 2016-02-19 A. A. Timopheev , R. Sousa , M. Chshiev , T. Nguyen , B. Dieny

The crystal and magnetic structures of AlFe2B2 have been studied with a combination of X-ray and neutron diffraction and electronic structure calculations. The magnetic and magnetocaloric properties have been investigated by magnetisation…

We report temperature dependent magnetization and neutron diffraction measurements on the corundum related magnetoelectric antiferromagnet Mn$_{4}$Ta$_{2}$O$_{9}$. Measurements performed on a single crystalline specimen reveal that the…

Strongly Correlated Electrons · Physics 2021-01-20 Soumendra Nath Panja , Pascal Manuel , Sunil Nair
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