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The rapid advancement of digital technologies necessitates significant progress in functional materials, which are often derived from scarce elements and involve complex manufacturing processes. Additionally, the trend towards…

2D ferromagnets offer valuable insights into the fundamentals of magnetism and stimulate the progress of ultracompact spintronics. The demand for seamless integration of the materials with the Si technology, particularly helpful to their…

In the last decade, transition-metal-doped ZnO has been intensively investigated as a route to room-temperature diluted magnetic semiconductors (DMSs). However, the origin for the reported ferromagnetism in ZnO-based DMS remains…

Materials Science · Physics 2009-08-05 Shengqiang Zhou , K. Potzger , J. von Borany , R. Groetzschel , W. Skorupa , M. Helm , J. Fassbender

We report results of studying the magnetization, specific heat and thermal expansion of a single crystal with nominal composition Mn 0.85 Fe 0.15 Si . We found no thermodynamic evidences in favor a second order phase transition in the 15 %…

Strongly Correlated Electrons · Physics 2019-09-11 A. E. Petrova , Dirk Menzel , S. M. Stishov

We report room temperature ferromagnetism in Ni doped CeO2 nanoparticles using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and dc magnetization measurements. Nanoparticles of Ce1-xNixO2 (0.0 \leq x…

Mesoscale and Nanoscale Physics · Physics 2011-01-31 Shalendra Kumar , Young. Joo. Kim , B. H. Koo , C. G. Lee

Magnetic cooling has the potential to replace conventional gas compression refrigeration. Materials such as La(Fe,Si)$_{13}$ exhibit a sizeable first-order magnetocaloric effect, and it is possible to tailor the phase transition towards…

Two-dimensional van der Waals MnBi$_{2n}$Te$_{3n+1}$ (n = 1, 2, 3, 4) compounds have been recently found to be intrinsic magnetic topological insulators rendering quantum anomalous Hall effect and diverse topological states. Here, we…

Strongly Correlated Electrons · Physics 2021-01-13 Lei Ding , Chaowei Hu , Erxi Feng , Chenyang Jiang , Iurii A. Kibalin , Arsen Gukasov , MiaoFang Chi , Ni Ni , Huibo Cao

We have grown the ferromagnetic semiconductor GaMnAs containing up to 10% Mn by migration enhanced epitaxy at a substrate temperature of 150^oC. The alternate supply of As2 molecules and Ga and Mn atoms made it possible to grow single…

The origin of room temperature (RT) ferromagnetism (FM) in Ni doped ZnO samples are systematically investigated through physical, optical, and magnetic properties of nanostructure, prepared by simple low-temperature wet chemical method.…

We report on a comprehensive combined experimental and theoretical study of Curie temperature trends in (Ga,Mn)As ferromagnetic semiconductors. Broad agreement between theoretical expectations and measured data allows us to conclude that…

In this paper, a correlation between structural and magnetic properties of Fe implanted ZnO is presented. High fluence Fe^+ implantation into ZnO leads to the formation of superparamagnetic alpha-Fe nanoparticles. High vacuum annealing at…

Materials Science · Physics 2007-05-23 Shengqiang Zhou , K. Potzger , H. Reuther , G. Talut , F. Eichhorn , J. von Borany , W. Skorupa , M. Helm , J. Fassbender

In this paper, we present a new method for the magnetic characterization of bulk materials, microstructures, and nanostructures. We investigated the magnetic and morphological properties of two colloidal dispersions of iron oxide (Fe3O4)…

The magnetic and electrical transport properties of Mn-doped amorphous silicon (\textit{a-}Mn$_{x}$Si$_{1-x}$) thin films have been measured. The magnetic susceptibility obeys the Curie-Weiss law for a wide range of $x$ (0.005-0.175) and…

Materials Science · Physics 2007-06-20 Li Zeng , E. Helgren , R. Islam , B. J. Wilkens , R. J. Culbertson , David J. Smith , F. Hellman

Iron nanoparticles are among the most promising low-dimensional materials in terms of applications. This particularity is attributable to the magnetic properties of these nanoparticles, which exhibit different allotropes as a function of…

Materials Science · Physics 2024-06-18 Alexis Front , Georg Daniel Förster , Chu-Chun Fu , Cyrille Barreteau , Hakim Amara

Although InP and GaAs have very similar band-structure their magnetic properties appear to drastically differ. Critical temperatures in (In,Mn)P are much smaller than that of (Ga,Mn)As and scale linearly with Mn concentration. This is in…

Disordered Systems and Neural Networks · Physics 2016-10-12 Richard Bouzerar , Denis Machon , Patrice Melinon , Daniel May , Ute Löw , Shengqiang Zhou , Georges Bouzerar

A combination of high-resolution x-ray diffraction and a new technique of x-ray standing wave uorescence at grazing incidence is employed to study the structure of (Ga,Mn)As diluted magnetic semiconductor and its changes during post-growth…

Materials Science · Physics 2009-11-11 V. Holy , Z. Matej , O. Pacherova , V. Novak , M. Cukr , K. Olejnik , T. Jungwirth

New fluoropnictides BaMnPnF with Pn = As, Sb, Bi, are synthesized by stoichiometric reaction of elements with BaF\_2. The compounds crystallize in the tetragonal P4/nmm (No. 129, Z = 2) space group, with the ZrCuSiAs-type structure, as…

Strongly Correlated Electrons · Physics 2013-07-09 Bayrammurad Saparov , David J. Singh , V. Ovidiu Garlea , Athena S. Sefat

Bulk single crystals of manganese phosphide (MnP) were grown from melt at 1 GPa and 1200 C by using a cubic-anvil, high-pressure, and high-temperature technique. The obtained black colored crystals exhibit a plate-like morphology, with flat…

Superconductivity · Physics 2017-11-06 Nikolai D. Zhigadlo , Nicolo Barbero , Toni Shiroka

Millimeter-sized MnBi$_2$Te$_4$ single crystals are grown out of Bi-Te flux and characterized by measuring magnetic and transport properties, scanning tunneling microscope (STM) and spectroscopy (STS). The magnetic structure of…

Materials Science · Physics 2019-06-18 J. -Q. Yan , Q. Zhang , T. Heitmann , Z. L. Huang , W. D. Wu , D. Vaknin , B. C. Sales , R. J. McQueeney

The magnetic properties of a monolayer of Mn12 single molecule magnets grafted onto a Si substrate have been investigated using depth-controlled $\beta$-detected nuclear magnetic resonance. A low energy beam of spin polarized radioactive…

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