PROPERTIES AND MEASUREMENT OF SCANNING TUNNELING MICROSCOPE FABRICATED FERROMAGNETIC PARTICLE ARRAYS (INVITED)

被引：173
作者：
KENT, AD
VONMOLNAR, S
GIDER, S
AWSCHALOM, DD
机构：
[1] IBM CORP,DIV RES,TJ WATSON RES CTR,YORKTOWN HTS,NY 10598
[2] FLORIDA STATE UNIV,CTR MAT RES & TECHNOL,TALLAHASSEE,FL 32306
[3] UNIV CALIF SANTA BARBARA,DEPT PHYS,SANTA BARBARA,CA 93106
来源：
JOURNAL OF APPLIED PHYSICS | 1994年 / 76卷 / 10期
关键词：
D O I：
10.1063/1.358160
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The low temperature magnetic properties of arrays of scanning tunneling microscope (STM) fabricated ferromagnetic particles have been studied as a function of their dimension using a novel high sensitivity Hall magnetometer. Iron deposits with controlled shape and nanometer scale diameters (∼25 nm) are formed using a STM to decompose a metalorganic precursor [Fe(CO) 5] in the active area of the measurement device. The hysteresis loops change significantly in going from nearly isotropic to oriented high aspect ratio (6:1 length to diameter) filamentary particles. In particles of intermediate aspect ratio and diameter the largest coercive field of 2.7 kOe is observed. This behavior as well as the characteristics of the Hall magnetometer (spin sensitivity of 10-14 emu/ Hz1/2) are described.
引用
收藏
页码：6656 / 6660
页数：5
相关论文
共 10 条
[1]   OBSERVATION OF MACROSCOPIC SPIN PHENOMENA IN NANOMETER-SCALE MAGNETS [J].
AWSCHALOM, DD ;
MCCORD, MA ;
GRINSTEIN, G .
PHYSICAL REVIEW LETTERS, 1990, 65 (06) :783-786
[2]   SOME MATERIALS CONSIDERATIONS IN PARTICULATE MEDIA [J].
BERKOWITZ, AE .
IEEE TRANSACTIONS ON MAGNETICS, 1986, 22 (05) :466-471
[3]   THERMALLY ACTIVATED MAGNETIZATION REVERSAL IN ELONGATED FERROMAGNETIC PARTICLES [J].
BRAUN, HB .
PHYSICAL REVIEW LETTERS, 1993, 71 (21) :3557-3560
[4]   THERMAL FLUCTUATIONS OF A SINGLE-DOMAIN PARTICLE [J].
BROWN, WF .
PHYSICAL REVIEW, 1963, 130 (05) :1677-+
[5]   GROWTH OF HIGH-ASPECT-RATIO NANOMETER-SCALE MAGNETS WITH CHEMICAL-VAPOR-DEPOSITION AND SCANNING-TUNNELING-MICROSCOPY [J].
KENT, AD ;
SHAW, TM ;
VONMOLNAR, S ;
AWSCHALOM, DD .
SCIENCE, 1993, 262 (5137) :1249-1252
[6]   OBSERVATION OF THERMAL SWITCHING OF A SINGLE FERROMAGNETIC PARTICLE [J].
LEDERMAN, M ;
GIBSON, GA ;
SCHULTZ, S .
JOURNAL OF APPLIED PHYSICS, 1993, 73 (10) :6961-6963
[7]  
LEDERMAN M, IN PRESS J APPL PHYS
[8]  
Massalski T. B., 1990, BINARY ALLOY PHASE D, P842
[9]  
MORRISH AH, 1965, PHYSICAL PRINCIPLES
[10]   A MECHANISM OF MAGNETIC HYSTERESIS IN HETEROGENEOUS ALLOYS [J].
STONER, EC ;
WOHLFARTH, EP .
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1948, 240 (826) :599-642
1