A Combined TEM/STEM and Micromagnetic Study of the Anisotropic Nature of Grain Boundaries and Coercivity in Nd-Fe-B Magnets

<div>Visualization of the nucleation and propagation of the reversed magnetic domains in the 8-G model structure with a GB thickness of 8 nm (①–③) and 10 nm (④–⑥) with <svg height="12.5794pt" id="M119" style="vertical-align:-3.29107pt" version="1.1" viewbox="-0.0498162 -9.28833 11.4791 12.5794" width="11.4791pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M501 444C501 643 409 712 321 712C208 712 108 618 108 502C108 412 172 331 293 331C337 331 394 359 420 378C397 154 341 41 258 41C209 41 178 76 178 161C178 232 171 299 114 299C76 299 38 272 23 257L29 232C42 236 54 239 66 239C91 239 106 221 102 149C95 20 158 -12 219 -12C264 -12 314 10 353 47C461 150 501 295 501 444ZM423 443C423 433 422 422 421 412C401 396 370 385 335 385C245 385 180 444 180 537C180 609 212 671 286 671C349 671 423 595 423 443Z" id="g113-248"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="518" vert-adv-y="518"></glyph.data></g><g transform="matrix(.0091,0,0,-0.0091,6.409,3.132)"><path d="M245 635C92 635 37 457 37 312C37 149 91 -12 244 -12C395 -12 449 166 449 312C449 469 395 635 245 635ZM243 598C332 598 358 454 358 312C358 173 334 26 245 26C158 26 128 174 128 313S152 598 243 598Z" id="g50-49"></path><glyph.data ascent="3443" descent="-2856" horiz-adv-x="487" vert-adv-y="487"></glyph.data></g></svg> = 0°.</div>

Advances in Materials Science and Engineering

fig11

Figure 11

Figure 11: A Combined TEM/STEM and Micromagnetic Study of the Anisotropic Nature of Grain Boundaries and Coercivity in Nd-Fe-B Magnets 