Inter-particle interaction and thermal stability of ultra-fine Ba ferrite particles for high-density recording

Toshiyuki Suzuki, Terumitsu Tanaka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Newly developed ultra-fine Ba ferrite particles, having the mean diameters of 21.9-41.5nm, were used to prepare encapsulated powder samples and sheet samples. The powder samples and non-oriented sheet samples exhibited almost zero amplitude in δM peaks; however, the longitudinally oriented sheet samples showed positive δM peaks, implying that positive interaction acts among particles. It was clarified that this positive interaction accelerates magnetization time decay, when the applied reverse field is greater than some fraction of Hc, but it suppresses the time decay when the reverse field is smaller than the value. The magnetization time decay in the presence of a large reverse field was noticeable when particle diameters were < 30nm.

Original languageEnglish
Pages (from-to)328-330
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume242-245
Issue numberPART I
DOIs
Publication statusPublished - Apr 1 2002

Fingerprint

Particle interactions
particle interactions
Powders
Ferrite
ferrites
Magnetization
Thermodynamic stability
thermal stability
recording
decay
magnetization
interactions

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Inter-particle interaction and thermal stability of ultra-fine Ba ferrite particles for high-density recording. / Suzuki, Toshiyuki; Tanaka, Terumitsu.

In: Journal of Magnetism and Magnetic Materials, Vol. 242-245, No. PART I, 01.04.2002, p. 328-330.

Research output: Contribution to journalArticle

@article{9fab6783dae24de0b9688caaa18e806b,
title = "Inter-particle interaction and thermal stability of ultra-fine Ba ferrite particles for high-density recording",
abstract = "Newly developed ultra-fine Ba ferrite particles, having the mean diameters of 21.9-41.5nm, were used to prepare encapsulated powder samples and sheet samples. The powder samples and non-oriented sheet samples exhibited almost zero amplitude in δM peaks; however, the longitudinally oriented sheet samples showed positive δM peaks, implying that positive interaction acts among particles. It was clarified that this positive interaction accelerates magnetization time decay, when the applied reverse field is greater than some fraction of Hc, but it suppresses the time decay when the reverse field is smaller than the value. The magnetization time decay in the presence of a large reverse field was noticeable when particle diameters were < 30nm.",
author = "Toshiyuki Suzuki and Terumitsu Tanaka",
year = "2002",
month = "4",
day = "1",
doi = "10.1016/S0304-8853(01)01221-5",
language = "English",
volume = "242-245",
pages = "328--330",
journal = "Journal of Magnetism and Magnetic Materials",
issn = "0304-8853",
publisher = "Elsevier",
number = "PART I",

}

TY - JOUR

T1 - Inter-particle interaction and thermal stability of ultra-fine Ba ferrite particles for high-density recording

AU - Suzuki, Toshiyuki

AU - Tanaka, Terumitsu

PY - 2002/4/1

Y1 - 2002/4/1

N2 - Newly developed ultra-fine Ba ferrite particles, having the mean diameters of 21.9-41.5nm, were used to prepare encapsulated powder samples and sheet samples. The powder samples and non-oriented sheet samples exhibited almost zero amplitude in δM peaks; however, the longitudinally oriented sheet samples showed positive δM peaks, implying that positive interaction acts among particles. It was clarified that this positive interaction accelerates magnetization time decay, when the applied reverse field is greater than some fraction of Hc, but it suppresses the time decay when the reverse field is smaller than the value. The magnetization time decay in the presence of a large reverse field was noticeable when particle diameters were < 30nm.

AB - Newly developed ultra-fine Ba ferrite particles, having the mean diameters of 21.9-41.5nm, were used to prepare encapsulated powder samples and sheet samples. The powder samples and non-oriented sheet samples exhibited almost zero amplitude in δM peaks; however, the longitudinally oriented sheet samples showed positive δM peaks, implying that positive interaction acts among particles. It was clarified that this positive interaction accelerates magnetization time decay, when the applied reverse field is greater than some fraction of Hc, but it suppresses the time decay when the reverse field is smaller than the value. The magnetization time decay in the presence of a large reverse field was noticeable when particle diameters were < 30nm.

UR - http://www.scopus.com/inward/record.url?scp=0036530583&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036530583&partnerID=8YFLogxK

U2 - 10.1016/S0304-8853(01)01221-5

DO - 10.1016/S0304-8853(01)01221-5

M3 - Article

AN - SCOPUS:0036530583

VL - 242-245

SP - 328

EP - 330

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - PART I

ER -