The present invention provides a contact member that strikes a balance between low electrical resistance and sliding durability under the condition of load as low as about 0.1 N. A contact member of the invention has a metal base and a coating disposed on at least part of the metal base. The coating contains fluorinated oil having a polar group, and metal particles surface-treated with a fluorine-based compound having a polar group.

The present invention provides a contact member that strikes a balance between low electrical resistance and sliding durability. A contact member of the invention has a metal base and a coating disposed on at least part of the metal base. The coating contains fluorinated oil having a polar group, and metal particles surface-treated with a fluorine-based compound having a polar group.

A lubricant for magnetic media according to general formula (I):
Rv.sup.1-Rb.sup.1Re.sup.1-Rc-Re.sup.2Rb.sup.2-Rv.sup.2(I); where Rc is an optionally non-fluorinated divalent linking segment comprising a first at least one anchoring functional group engageable with a protective overcoat of a magnetic recording medium; where each Re.sup.1 and Re.sup.2 has a rotational energy barrier that is greater than the rotational energy barrier of CH.sub.2; where each Rb.sup.1 and Rb.sup.2 independently is a chain segment comprising at least one of a fluoroalkyl ether moiety, a fluoroalkenyl ether moiety, a perfluoroalkyl ether moiety, a perfluoroalkenyl ether moiety, or a combination thereof; and where each of Rv.sup.1 and Rv.sup.2, when present, independently each has a second at least one anchoring functional group engageable with the protective overcoat of a magnetic recording medium. Re.sup.1-Rc-Re.sup.2 may have the formula: ##STR00001##
where R.sub.L, if present, is C.sub.nM.sub.2, wherein M is H, and n is from 1 to 10.

A lubricant for magnetic media according to general formula (I):

##STR00001##

where Rc is an optionally non-fluorinated divalent linking segment comprising a first at least one anchoring functional group engageable with a protective overcoat of a magnetic recording medium; where each Re.sup.1 and Re.sup.2 has a rotational energy barrier that is greater than the rotational energy barrier of CH.sub.2; where each Rb.sup.1 and Rb.sup.2 independently is a chain segment comprising at least one of a fluoroalkyl ether moiety, a fluoroalkenyl ether moiety, a perfluoroalkyl ether moiety, a perfluoroalkenyl ether moiety, or a combination thereof; and where each of Rv.sup.1 and Rv.sup.2, when present, independently each has a second at least one anchoring functional group engageable with the protective overcoat of a magnetic recording medium. Re.sup.1RcRe.sup.2 may have the formula:

##STR00002##

where R.sub.L, if present, is C.sub.nM.sub.2, wherein M is H, and n is from 1 to 10.