Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 53 for “"antiferromagnets"”.
-
Magnetoresistance effects in metallic antiferromagnets
Antiferromagnets are drawing significant interest as alternatives to ferromagnets in designing faster and more robust memory devices. Recent theoretical and experimental advances show that antiferromagnets can be readily detected and manipulated owing to their diverse crystal and magnetic …
-
Magnetostriction in ferromagnets and antiferromagnets.
Thesis. 1977. Ph.D.--Massachusetts Institute of Technology. Dept. of Physics.
-
THz spin dynamics in collinear antiferromagnets
Contains fulltext : 317916.pdf (Publisher’s version ) (Open Access)
-
Current-induced Dynamics of Easy-Plane Antiferromagnets
… non-volatile random-access memory. However, in antiferromagnets, it used to be challenging to accurately understand the current-induced dynamics, especially the spin-orbit-torque switching dynamics. To realize a practical antiferromagnetic memory device, we must overcome the challenge. In this …
-
Hybrid Magnonics in Antiferromagnets and Cavity Spintronic Devices
Hybrid dynamic systems combine advantages from different subsystems for realizing information processing tasks in both classical and quantum domains. Magnons, the collective spin wave excitations in magnetically ordered materials, have recently attracted great attention for realizing hybrid dynamic …
-
Synthesis and characterization of single crystal kagomé lattice antiferromagnets
An ideal spin-% kagomé lattice has been a long sought material. This system is characterized by strong magnetic frustration and is a likely candidate for a spin-liquid ground state. The spin-liquid state was originally proposed to exist in the parent compounds of the high temperature …
-
Coherent Terahertz Control and Ultrafast Spectroscopy of Layered Antiferromagnets
The central theme of modern condensed matter physics is to understand the emergent phenomena arising from interactions among Avogadro’s number of particles in quantum materials, alongside efforts to control their properties. While powerful transport, thermodynamic, and spectroscopic tools have been …
-
Phase relations, single crystal growth, and characterization of metallic antiferromagnets
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
-
Quantum dynamics of 2D antiferromagnets: predictions from theory and machine learning
Contains fulltext : 250503.pdf (Publisher’s version ) (Open Access)
-
Synthesis, structure, and magnetic properties of spin-1/2 kagomé antiferromagnets
Stoichiometrically pure S = 1/2 Cu2+ kagomé materials have been synthesized. Such materials provide an ideal venue for exploration of quantum states on a kagomé because they exhibit strong geometric spin frustration and are predicted to show no magnetic long-range ordering (LRO). The three broad …
-
Strongly coupled systems : from quantum antiferromagnets to unified models for superconductors
I discuss the significance of the antiferromagnetic Heisenberg model (AFHM) in both high-energy and condensed-matter physics, and proceed to describe an efficient cluster algorithm used to simulate the AFHM. This is one of two algorithms with which my collaborators and I were able to obtain …
-
Exploration of the CU-MN-AS ternary phase diagram and MN3B4 antiferromagnets
CuMnAs was first studied more than fifty years ago, both in a tetragonal phase (t-CuMnAs) and orthorhombic phase (o-CuMnAs). Today, the prospect of spintronics has created a new focus on antiferromagnetic materials with Néel temperatures above room temperature, with the goal of reading and writing …
-
First-principles study of magnetic ground and excited-state properties of metallic antiferromagnets
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-14 without embargo terms
-
Probing the Behaviour of Antiferromagnets: Electric and Magnetic Measurements Across a Range of Length-scales
… These effects were measured for a number of antiferromagnets, and compared to magnetostatic measurements. SMR is primarily dependent on the interfacial properties of adjacent magnetic materials to the heavy metal, whereas the SSE probes deeper into the magnetic material, and so it was …
-
¹⁷O and ⁶³Cu NMR study of spin dynamics in low-dimensional spin 1/2 antiferromagnets
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
-
Spectroscopic study of emergent electronic phases in transition metal based compounds
Antiferromagnets with non-relativistic spin splitting are outstanding candidates as the next generation of spintronic materials owing to their electron-volt (eV) scale spin splitting, ultrafast spin dynamics and nearly vanishing stray fields. Achieving voltage-based control of spin polarization in …
-
Detection of antiferromagnetic domain reversal in epitaxial insulating oxides
… order. However, substituting ferromagnets by antiferromagnets as active switching elements in data storage devices offers the potential for ultrafast dynamics, improved non-volatility, higher bit packing density, and qualitatively new physical phenomena. These advantages spurred intensive …
-
Study of growing incongruent antiferromagnetic single crystals and characterization
Antiferromagnets are gaining increased attention as potential spintronic materials with faster switching rates compared to conventional ferromagnets. Recently reported studies have demonstrated partial switching of the Néel vector of antiferromagnetic CuMnAs and Mn2Au with current-induced …
-
Practical Pathways to Efficient MRAM: Spin-Orbit Torques, Low-Damping, and Anomalous Hall Conductivity in Polycrystalline Materials
… polycrystalline alternative to non-collinear antiferromagnets which require high temperature growth (>400°C). We find that sputter-grown γ-FeMn with no post-annealing, has a small non-zero net magnetization (≈(0.02-0.07)μB/atom) and perpendicular magnetic anisotropy only slightly larger than …
-
Picosecond Spin Seebeck Effect in Magnetic Insulators
… done at low frequency. Comparing two antiferromagnets from the same magnetic class but with very different values of the antiferromagnetic resonant frequencies (Chapter 5 and Chapter 6) provides insights on the role of magnon energy dispersion in determining the efficiency of …
Page 1 of 3