Tej N. Lamichhane

Discovery of ferromagnetism with large magnetic anisotropy in ZrMnP and HfMnP

ZrMnP and HfMnP single crystals are grown by a self-flux growth technique, and structural as well as temperature dependent magnetic and transport properties are studied. Both compounds have an orthorhombic crystal structure. ZrMnP and HfMnP are ferromagnetic with Curie temperatures around 370 K and 320 K, respectively. The spontaneous magnetizations of ZrMnP and HfMnP are determined to be 1.9 μB/f.u. and 2.1 μB/f.u., respectively, at 50 K. The magnetocaloric effect of ZrMnP in terms of entropy change (ΔS) is estimated to be −6.7 kJ m−3 K−1 around 369 K. The easy axis of magnetization is [100] for both compounds, with a small anisotropy relative to the [010] axis. At 50 K, the anisotropy field along the [001] axis is ∼4.6 T for ZrMnP and ∼10 T for HfMnP. Such large magnetic anisotropy is remarkable considering the absence of rare-earth elements in these compounds. The first principle calculation correctly predicts the magnetization and hard axis orientation for both compounds, and predicts the experimental...

Origin of the spin reorientation transitions in (Fe1–xCox)2B alloys

Low-temperature measurements of the magnetocrystalline anisotropy energy K in (Fe1–xCox)2B alloys are reported, and the origin of this anisotropy is elucidated using a first-principles electronic structure analysis. The calculated concentration dependence K(x) with a maximum near x = 0.3 and a minimum near x = 0.8 is in excellent agreement with experiment. This dependence is traced down to spin-orbital selection rules and the filling of electronic bands with increasing electronic concentration. At the optimal Co concentration, K depends strongly on the tetragonality and doubles under a modest 3% increase of the c/a ratio, suggesting that the magnetocrystalline anisotropy can be further enhanced using epitaxial or chemical strain.

Ce3-xMgxCo9: Transformation of a Pauli Paramagnet into a Strong Permanent Magnet

We report on the synthesis of single crystalline and polycrystalline samples of Ce

Crystal structure, homogeneity range and electronic structure of rhombohedral γ-Mn5Al8

_{3-x}

Structural and ferromagnetic properties of an orthorhombic phase of MnBi stabilized with Rh additions

Mg

Single Crystal Permanent Magnet: Extraordinary Magnetic Behavior in the ta, Cu and Fe Substituted CeCo5 System

_x

Magnetic properties of single crystalline itinerant ferromagnet AlFe2B2

Co

Effect of nickel substitution on magnetism in the layered van der Waals ferromagnet Fe3GeTe2

_9

The Effects of Nickel Substitution on Ferromagnetism in Fe

solid solution (

_3

0\leq x \lesssim 1.4