A magnetic and compositional study of the disproportionated stage of the solid-HDDR process in NdFeB-type materials

Pauline Thompson; Oliver Gutfleisch; John N Chapman; I Rex Harris; W A P Nicholson

doi:10.1016/S0925-8388(98)00762-2

A magnetic and compositional study of the disproportionated stage of the solid-HDDR process in NdFeB-type materials

Pauline Thompson, Oliver Gutfleisch, John N Chapman, I Rex Harris, W A P Nicholson

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A thinned sample of Nd12.8Fe69.2Co11Ga1B6 after the disproportionation stage of the solid-HDDR process has been examined using advanced transmission electron microscopy techniques. High resolution X-ray mapping is particularly useful for showing the distribution of all elements with the exception of B. Elemental maps show clearly that during the disproportionation reaction, Co and Ga partitioned into the a-Fe and not into the NdH2. Domain observations using Lorentz microscopy revealed irregular domain walls whose location was influenced by the non-magnetic NdH2 inclusions. The walls moved easily under small applied magnetic fields in a series of discrete jumps. The behaviour was consistent with that of a soft magnetic material with low anisotropy, and differed markedly from that of the recombined material.

Original language	English
Pages (from-to)	12–16
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	281
Issue number	1
DOIs	https://doi.org/10.1016/S0925-8388(98)00762-2
Publication status	Published - 20 Nov 1998

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title = "A magnetic and compositional study of the disproportionated stage of the solid-HDDR process in NdFeB-type materials",

abstract = "A thinned sample of Nd12.8Fe69.2Co11Ga1B6 after the disproportionation stage of the solid-HDDR process has been examined using advanced transmission electron microscopy techniques. High resolution X-ray mapping is particularly useful for showing the distribution of all elements with the exception of B. Elemental maps show clearly that during the disproportionation reaction, Co and Ga partitioned into the a-Fe and not into the NdH2. Domain observations using Lorentz microscopy revealed irregular domain walls whose location was influenced by the non-magnetic NdH2 inclusions. The walls moved easily under small applied magnetic fields in a series of discrete jumps. The behaviour was consistent with that of a soft magnetic material with low anisotropy, and differed markedly from that of the recombined material.",

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T1 - A magnetic and compositional study of the disproportionated stage of the solid-HDDR process in NdFeB-type materials

AU - Thompson, Pauline

AU - Gutfleisch, Oliver

AU - Chapman, John N

AU - Harris, I Rex

AU - Nicholson, W A P

PY - 1998/11/20

Y1 - 1998/11/20

N2 - A thinned sample of Nd12.8Fe69.2Co11Ga1B6 after the disproportionation stage of the solid-HDDR process has been examined using advanced transmission electron microscopy techniques. High resolution X-ray mapping is particularly useful for showing the distribution of all elements with the exception of B. Elemental maps show clearly that during the disproportionation reaction, Co and Ga partitioned into the a-Fe and not into the NdH2. Domain observations using Lorentz microscopy revealed irregular domain walls whose location was influenced by the non-magnetic NdH2 inclusions. The walls moved easily under small applied magnetic fields in a series of discrete jumps. The behaviour was consistent with that of a soft magnetic material with low anisotropy, and differed markedly from that of the recombined material.

AB - A thinned sample of Nd12.8Fe69.2Co11Ga1B6 after the disproportionation stage of the solid-HDDR process has been examined using advanced transmission electron microscopy techniques. High resolution X-ray mapping is particularly useful for showing the distribution of all elements with the exception of B. Elemental maps show clearly that during the disproportionation reaction, Co and Ga partitioned into the a-Fe and not into the NdH2. Domain observations using Lorentz microscopy revealed irregular domain walls whose location was influenced by the non-magnetic NdH2 inclusions. The walls moved easily under small applied magnetic fields in a series of discrete jumps. The behaviour was consistent with that of a soft magnetic material with low anisotropy, and differed markedly from that of the recombined material.

U2 - 10.1016/S0925-8388(98)00762-2

DO - 10.1016/S0925-8388(98)00762-2

M3 - Article

SN - 0925-8388

VL - 281

SP - 12

EP - 16

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

IS - 1

ER -

A magnetic and compositional study of the disproportionated stage of the solid-HDDR process in NdFeB-type materials

Abstract

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