Magnetic and Spin-glass-like Behavior of CrO[sub 2] Nanoparticles

by: CR Wang, DS Yang, YY Chen, JC Ho

AIP Conference Proceedings, Vol. 850, No. 1. (2006), pp. 1153-1154.

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Abstract

Chromium dioxide CrO2 nanoparticles with size below 4 nm were chemically synthesized. In contrast to the bulk compound, which undergoes a ferromagnetic transition at 390 K, SQUID data of the highly-disordered nanoparticles follow approximately a Curie-Weiss fit. The low temperature specific heat is dominated by a much larger ferromagnetic spin-wave term than that of bulk CrO2. A spin-glass-type transition occurs near 6.5 K, based on the observation of a cusp in the temperature dependence of the ac susceptibility, accompanied by a small specific heat anomaly.

@article{citeulike:1876148, abstract = {Chromium dioxide CrO2 nanoparticles with size below 4 nm were chemically synthesized. In contrast to the bulk compound, which undergoes a ferromagnetic transition at 390 K, SQUID data of the highly-disordered nanoparticles follow approximately a Curie-Weiss fit. The low temperature specific heat is dominated by a much larger ferromagnetic spin-wave term than that of bulk CrO2. A spin-glass-type transition occurs near 6.5 K, based on the observation of a cusp in the temperature dependence of the ac susceptibility, accompanied by a small specific heat anomaly.}, author = {Wang, C. R. and Yang, D. S. and Chen, Y. Y. and Ho, J. C. }, citeulike-article-id = {1876148}, doi = {10.1063/1.2355112}, journal = {AIP Conference Proceedings}, keywords = {chromium, cro2, dioxide, ferromagnetic, magnetic, nanoparticles}, number = {1}, pages = {1153--1154}, posted-at = {2007-11-07 03:34:19}, priority = {2}, publisher = {AIP}, title = {Magnetic and Spin-glass-like Behavior of CrO[sub 2] Nanoparticles}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=APCPCS000850000001001153000001\&idtype=cvips\&gifs=yes}, volume = {850}, year = {2006} }

RIS record

TY - JOUR ID - citeulike:1876148 L3 - citeulike-article-id:1876148 TI - Magnetic and Spin-glass-like Behavior of CrO[sub 2] Nanoparticles JF - AIP Conference Proceedings VL - 850 IS - 1 SP - 1153 EP - 1154 PB - AIP N2 - Chromium dioxide CrO2 nanoparticles with size below 4 nm were chemically synthesized. In contrast to the bulk compound, which undergoes a ferromagnetic transition at 390 K, SQUID data of the highly-disordered nanoparticles follow approximately a Curie-Weiss fit. The low temperature specific heat is dominated by a much larger ferromagnetic spin-wave term than that of bulk CrO2. A spin-glass-type transition occurs near 6.5 K, based on the observation of a cusp in the temperature dependence of the ac susceptibility, accompanied by a small specific heat anomaly. KW - chromium KW - cro2 KW - dioxide KW - ferromagnetic KW - magnetic KW - nanoparticles AU - Wang, CR AU - Yang, DS AU - Chen, YY AU - Ho, JC PY - 2006/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=APCPCS000850000001001153000001&idtype=cvips&gifs=yes ER -

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