Role of Domain Structure Change in the Coercivity Mechanism of Sintered Permanent Magnets

2021 ◽  
Vol 68 (12) ◽  
pp. 523-535
Author(s):  
Kurima KOBAYASHI
Keyword(s):  
Domain Structure ◽  
Permanent Magnets ◽  
Structure Change ◽  
Sintered Permanent Magnets ◽  
Coercivity Mechanism

MICROSTRUCTURE AND COERCIVITY IN (Nd, Dy)-(Fe, Co)-B BASED SINTERED PERMANENT MAGNETS WITH MINOR Nb AND Ga ADDITIONS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-573-C8-574
Author(s):  
G. F. Zhou ◽  
X. K. Sun ◽  
Y. C. Chuang ◽  
L. Gao ◽  
Z. Yu ◽  
...  
Keyword(s):  
Permanent Magnets ◽  
Sintered Permanent Magnets

A HYBRID MODEL ON HYSTERESIS LOOP AND COERCIVITY IN NANOSTRUCTURED PERMANENT MAGNETS

2006 ◽  
Vol 05 (04n05) ◽  
pp. 627-631 ◽  
Author(s):  
M. J. SUN ◽  
G. P. ZHAO ◽  
J. LIANG ◽  
G. ZHOU ◽  
H. S. LIM ◽  
...  
Keyword(s):  
Thin Films ◽  
Domain Wall ◽  
Grain Boundary ◽  
Magnetic Moment ◽  
Permanent Magnets ◽  
Hysteresis Loops ◽  
Bulk Materials ◽  
Rotational Model ◽  
Moment Distribution ◽  
Coercivity Mechanism

A simplified micromagnetic model has been proposed to calculate the hysteresis loops of nanostructured permanent magnets for various configurations, including thin films, exchange-coupled double-layer systems and bulk materials. The reversal part of the hysteresis is based on the Stoner–Wohlfarth coherent rotational model and the coercivity mechanism is due mainly to the motion of the transition region (a domain wall like magnetic moment distribution in the grain boundary). The elements of nucleation and pinning models are also incorporated.

Studies on Nd(Fe/sub 0.92-x/B/sub 0.08/Ga/sub x/)/sub 5.5/ sintered permanent magnets

1990 ◽  
Author(s):  
R. Grossinger ◽  
X.C. Kou ◽  
R. Krewenka ◽  
H.R. Kirchmayr ◽  
M. Tokunaga
Keyword(s):  
Permanent Magnets ◽  
Sintered Permanent Magnets

Role of nanoscale interfacial defects on magnetic properties of the 2:17-type Sm–Co permanent magnets

2020 ◽  
Vol 816 ◽  
pp. 152620 ◽  
Author(s):  
Xin Song ◽  
Xianglong Zhou ◽  
Tao Yuan ◽  
Jingdong Wang ◽  
Ming Yue ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Permanent Magnets ◽  
Interfacial Defects

scholarly journals OnTAD: hierarchical domain structure reveals the divergence of activity among TADs and boundaries

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Lin An ◽  
Tao Yang ◽  
Jiahao Yang ◽  
Johannes Nuebler ◽  
Guanjue Xiang ◽  
...  
Keyword(s):  
Gene Expression ◽  
Gene Regulation ◽  
Domain Structure ◽  
High Frequency ◽  
Spatial Organization ◽  
Structural Units ◽  
Regulatory Interactions ◽  
Link Type ◽  
Topologically Associating Domains

AbstractThe spatial organization of chromatin in the nucleus has been implicated in regulating gene expression. Maps of high-frequency interactions between different segments of chromatin have revealed topologically associating domains (TADs), within which most of the regulatory interactions are thought to occur. TADs are not homogeneous structural units but appear to be organized into a hierarchy. We present OnTAD, an optimized nested TAD caller from Hi-C data, to identify hierarchical TADs. OnTAD reveals new biological insights into the role of different TAD levels, boundary usage in gene regulation, the loop extrusion model, and compartmental domains. OnTAD is available at https://github.com/anlin00007/OnTAD.

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