Magnetic properties of carbon nanodisk and nanocone powders

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F13%3A00213891" target="_blank" >RIV/68407700:21340/13:00213891 - isvavai.cz</a>

Výsledek na webu

<a href="http://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.014434" target="_blank" >http://journals.aps.org/prb/abstract/10.1103/PhysRevB.87.014434</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.87.014434" target="_blank" >10.1103/PhysRevB.87.014434</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetic properties of carbon nanodisk and nanocone powders

Popis výsledku v původním jazyce

We have investigated the magnetic properties of carbon powders which consist of nanodisks, nanocones, and a small fraction of carbon-black particles. Magnetization measurements were carried out using a superconducting quantum interference device in magnetic fields -5 < mu H-0 < 5 T for temperatures in the range 2 <= T < 350 K. Measurements of the magnetization M versus temperature T and magnetic field mu H-0 for these carbon samples show diamagnetism and paramagetism with an additional ferromagnetic contribution. The ferromagnetic magnetization is in agreement with the calculated magnetization from Fe impurities as determined by the particle-induced x-ray emission method (<75 mu g/g). Magnetization measurements in weak magnetic fields show thermal hysteresis, and for strong fields the magnetization M decreases as M similar to aT(-alpha) with alpha < 1, which is slower than the Curie law (alpha = 1), when the temperature increases. The magnetization M versus magnetic field mu H-0 shows

Název v anglickém jazyce

Magnetic properties of carbon nanodisk and nanocone powders

Popis výsledku anglicky

We have investigated the magnetic properties of carbon powders which consist of nanodisks, nanocones, and a small fraction of carbon-black particles. Magnetization measurements were carried out using a superconducting quantum interference device in magnetic fields -5 < mu H-0 < 5 T for temperatures in the range 2 <= T < 350 K. Measurements of the magnetization M versus temperature T and magnetic field mu H-0 for these carbon samples show diamagnetism and paramagetism with an additional ferromagnetic contribution. The ferromagnetic magnetization is in agreement with the calculated magnetization from Fe impurities as determined by the particle-induced x-ray emission method (<75 mu g/g). Magnetization measurements in weak magnetic fields show thermal hysteresis, and for strong fields the magnetization M decreases as M similar to aT(-alpha) with alpha < 1, which is slower than the Curie law (alpha = 1), when the temperature increases. The magnetization M versus magnetic field mu H-0 shows

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review B

ISSN

0163-1829

e-ISSN

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Svazek periodika

2013

Číslo periodika v rámci svazku

87

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000314223900001

EID výsledku v databázi Scopus

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