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Neutron diffraction and magnetization measurements of the magneto refrigerant Mn1+yFe1-yP1-xGex reveal that the ferromagnetic and paramagnetic phases correspond to two very distinct crystal structures, with the magnetic entropy change as a…

Magnetic and magnetoelastic properties of terbium titanate pyrochlore in paramagnetic phase are simulated. The magnetic field and temperature dependences of magnetization and forced magnetostriction in Tb2Ti2O7 single crystals and…

Strongly Correlated Electrons · Physics 2011-10-27 V. V. Klekovkina , A. R. Zakirov , B. Z. Malkin , L. A. Kasatkina

Ferromagnetic solids acquire nontrivial magnetic and caloric properties when the temperature of the structural phase transition approaches the Curie point. Deciphering magneto-structural transitions, i.e. determining their characteristic…

In this paper we report an investigation on the ferromagnetic state and the nature of ferromagnetic transition of nanoparticles of $\mathrm{La_{0.67}Ca_{0.33}MnO_3}$ using magnetic measurements and neutron diffraction. The investigation was…

Strongly Correlated Electrons · Physics 2011-01-04 Tapati Sarkar , A. K. Raychaudhuri , A. K. Bera , S. M. Yusuf

We report the magnetic phase diagram of single-crystalline LiFePO$_4$ in magnetic fields up to 58~T and present a detailed study of magneto-elastic coupling by means of high-resolution capacitance dilatometry. Large anomalies at \tn\ in the…

Strongly Correlated Electrons · Physics 2019-07-03 J. Werner , S. Sauerland , C. Koo , C. Neef , A. Pollithy , Y. Skourski , R. Klingeler

We study the temperature dependence of strain under constant magnetic-fields in Ni-Mn based ferromagnetic Heusler alloys in the form Ni-Mn-$X$ ($X$: Ga, In, Sn, Sb) which undergo a martensitic transformation. We discuss the influence of the…

Energy-efficient switching of nanoscale magnets requires the application of a time-varying magnetic field characterized by microwave frequency. At finite temperatures, even weak thermal fluctuations create perturbations in the magnetization…

Mesoscale and Nanoscale Physics · Physics 2023-12-19 Mohammad H. A. Badarneh , Grzegorz J. Kwiatkowski , Pavel F. Bessarab

We studied the correlation between magnetic, electrical, structural, and magnetostriction properties of the electron doped manganites Ca$_x$Sm$_{1-x}$MnO$_3$ (x = 0.85, 0.8). The paramagnetic to antiferromagnetic transition in both the…

Kinetics of polymorphous "gamma"-"alfa" transformation in Fe is studied numerically within a model taking into account both lattice and magnetic degrees of freedom, based on first-principle calculations of the total energy for different…

Materials Science · Physics 2013-03-21 I. K. Razumov , Yu. N. Gornostyrev , M. I. Katsnelson

We study computational behavior of a mesoscopic model describing temperature/external magnetic field-driven evolution of magnetization. Due to nonconvex anisotropy energy describing magnetic properties of a body, magnetization can develop…

Numerical Analysis · Mathematics 2016-11-22 Martin Kružík , Jan Valdman

The Prototypical magnetic memory shape alloy Ni$_2$MnGa undergoes various phase transitions as a function of temperature, pressure, and doping. In the low-temperature phases below 260 K, an incommensurate structural modulation occurs along…

Strongly Correlated Electrons · Physics 2017-12-06 G. Lantz , M. J. Neugebauer , M. Kubli , M. Savoini , E. Abreu , K. Tasca , C. Dornes , V. Esposito , J. Rittmann , Y. W. Windsor , P. Beaud , G. Ingold , S. L. Johnson

We present an extensive study of the time dependence of the magnetization in a polycrystalline and low temperature charge ordered La0.5Ca0.5MnO3 sample. After application and removal of a 5 T magnetic field, a systematic variation of the…

Strongly Correlated Electrons · Physics 2007-05-23 J. Lopez , P. N. Lisboa-Filho , W. A. C. Passos , W. A. Ortiz , F. M. Araujo-Moreira

The microscopic magnetism in the helical, the conical and the ferro-magnetically polarized phases in an itinerant helical magnet, MnSi, has been studied by an extended 29Si NMR at zero field and under external magnetic fields. The…

Strongly Correlated Electrons · Physics 2016-06-22 Hiroshi Yasuoka , Kiyoichiro Motoya , Mayukh Majumder , Sebastian Witt , Cornelius Krellner , Michael Baenitz

Experimental data obtained with the perovskite compounds Pr$_{0.55}$Sr$_{0.45}$MnO$_{3}$ show that the magnetization decreases with increasing temperature $T$ and undergoes a very sharp phase transition to the paramagnetic phase. The sharp…

Materials Science · Physics 2024-01-12 Yethreb Essouda , Hung T. Diep , Mohamed Ellouze

The magnetic properties of the alloy system Fe3-xMnxSi have been studied by measuring magnetization for samples with x = 0, 0.1, 0.25, 0.5, and by thermal scanning techniques for samples with x = 0, 0.1. The results reveal that the system…

Materials Science · Physics 2017-11-09 Mahdi S. Lataifeh , Mick OShea , Ahmad S. Saleh , Sami H. Mahmood

(Mn,Fe)2(P,Si) single crystals have been successfully grown by flux method. Single crystal diffraction demonstrates that Mn0.83Fe1.17P0.72Si0.28 crystallizes in a hexagonal crystal structure (space group P-62m) at both 100 and 280 K, in the…

Materials Science · Physics 2015-08-03 H. Yibole , F. Guillou , Y. K. Huang , G. R. Blake , A. J. E. Lefering , N. H. van Dijk , E. Brück

We have studied the magnetic relaxation properties of the phase-separated manganite compound La0.250Pr0.375Ca0.375MnO3 . A series of polycrystalline samples was prepared with different sintering temperatures, resulting in a continuous…

Strongly Correlated Electrons · Physics 2016-08-16 I. G. Deac , S. V. Diaz , B. G. Kim , S. -W. Cheong , P. Schiffer

The results of large-scale simulations investigating the dynamics of magnetization reversal in arrays of single-domain nanomagnets after a rapid reversal of the applied field at nonzero temperature are presented. The numerical micromagnetic…

Materials Science · Physics 2009-10-31 Gregory Brown , M. A. Novotny , Per Arne Rikvold

The magnetic and multiferroic phase diagram of Mn$_{0.85}$Co$_{0.15}$WO$_4$ single crystals is investigated by means of magnetic, heat capacity, dielectric, polarization, and neutron scattering experiments. Three magnetic phase transitions…

Strongly Correlated Electrons · Physics 2010-12-01 R. P. Chaudhury , F. Ye , J. A. Fernandez-Baca , Y. -Q. Wang , Y. Y. Sun , B. Lorenz , H. A. Mook , C. W. Chu

Magnetization and its relaxation have been measured on Ba0.6K0.4Fe2As2 single crystals with Tc = 39 K. The magnetization hysteresis loops (MHLs) exhibit flux jumps in the low temperature region, and a second peak-effect in the intermediate…

Superconductivity · Physics 2011-12-01 Bing Shen , Huan Yang , Bin Zeng , Cong Ren , Xibin Xu , Hai-Hu Wen